Was that clip linked to a video clip? If so, you may not be able to "delete and close gap."
It sounds like you're struggling with the "ripple" system.
When you insert a clip, all of the clips to the right break and shift right.
When you delete a clip from the middle of your movie, all of the clips move left to fill in the gap -- UNLESS you've got video or audio on a parallel track that's keeping the gap from being a true gap in the movie.
Also, depending on which version of the program you're using, rippling is based on the video on the Video 1/Audio 1 track.
Could that be what you're experiencing?
Yes. This is what I'm experiencing. There is a music track below the video track. However I need the music track there as I'm am editing and cutting to the music.
Is there no way around this blank space being created whilst editing to music? How do people editing music videos use this program?
I've got some tips on how to work with rippling timelines in my book, on Amazon.
Basically the secret is to hold down the Ctrl key or the Alt key as you add your still photos or videos to the timeline. This will override the ripple feature so that your soundtrack won't break apart as you add to your video track.
Lynda.com is a training site. Steve does videos there and Lynda puts a few on YouTube for marketing, promotion or trials. One on inserting and managing clips is here: Premiere Elements tutorial: Adding clips, slice, trim, and ripple edits | lynda.com - YouTube This particular video leaves out use of the Alt key but provides an alternate way with a variety of choices.
Adobe also provides on line documentation. The techniques of inserting are here: How to arrange clips in the Expert view timeline with Premiere Elements
A couple paragraphs down it says:
Add clips to the Expert view timeline:
When you insert a clip into the Expert view timeline, adjacent clips on all tracks shift to accommodate the new clip. By shifting all clips together, the audio and video of the existing clips remain in sync.
Sometimes, you don’t want all clips to shift with each insertion. For example, when you add background music that superimposes the entire movie, you don’t want clips to shift.
To shift specific clips togather, press the Alt key as you insert. At a time, you can shift specific clips simultaneously on a maximum of two tracks. These include the track receiving the insertion and the track containing the linked audio or video (if any). The affected tracks shift together, remaining aligned. The clips on other tracks are unaffected.
Insert a clip, shift clips in the Expert view timeline
Do one of the following:
Drag the clip from the Project Assets panel to the desired location in the Expert view timeline. When the pointer changes to the Insert icon, release the mouse.
Move the current‑time indicator to the desired location in the Expert view timeline. Then select the clip in the Project Assets panel and choose Clip > Insert.
Insert a clip, shift clips on only the target and linked tracks
Alt‑drag the clip from the Project Assets panel to the desired location in the Expert view timeline. When the pointer changes to the Insert icon, release the mouse.
If you drag a clip into the blank space above the topmost video track (for video) or below the lowest audio track (for audio), Adobe Premiere Elements creates a new track for the clip. If the clip contains both audio and video, it creates both a new video and new audio track.
Overlay a clip in the Expert view timeline
The easiest way to replace a portion of a video is to overlay it with other footage. When you overlay a clip, the clip you add replaces any existing frames starting at the location you designate.
If the new clip is 40 frames long, it overlays 40 frames of the existing clip. The frames following the overlay, if any, remain at the same location in the track. Overlays do not change the length of the movie unless the overlay extends beyond the end of the movie.
Do one of the following:
Ctrl‑drag/Cmd-drag the clip from the Project Assets panel to the first frame you want to overlay. When the pointer changes to the Overlay icon, release the mouse.
Move the current‑time indicator to the first frame you want to overlay, select the clip in the Project Assets panel, and then choose Clip > Overlay.
Place one clip above another in the Expert view timeline
You can place one clip above another without replacing a section of the lower clip as is done with an overlay. You can use clips stacked in this way, for example, with various keying effects.
->In the Expert view timeline, drag the current-time indicator to a location above a video clip where you want to overlay another clip.
->Shift-drag a clip from the Project Assets panel, and drop it on to the Monitor panel.
->Choose Place On Top.
Adobe Premiere Elements drops the second clip into the first available video track at the location of the current-time indicator.