Did the original clip have audio?
Yes I set the in and out points and then dragged the video only back into the browser panel thinking I was capturing audio as well.
Right click on the video clip
Menu> Reveal in Project
Re open it in the Source Monitor (dble click) and replace the instance in the Timeline.
Your In and Outs should still be marked as they were
A few ways to do that replacement. Drag overlay probably simplest (but check out 'Replace' for next time)