How can I erase images from the clipboard while using ink and slide or sketches and lines apps?

I've been having trouble with my clipboard while using my adobe ink. Is there any way I can erase the images saved on the clipboard, because have been trying and I can't find a way to do it, it seems like the only option is by turning the selection into favorites and then a trashcan icon appears, but even if I choose delete it will only be erased from the clipboard favorites while remaining on the clipboard.

I've thought erasing the sketches App, or deleting the project but I don't want to risk losing my work.

Thanks!