Why did you capture PAL? Did you telecine to PAL? Are you in a PAL country?
Then just edit PAL 25fps and you should be fine. If your footage was telecined to PAL tapes, then you capture PAL, then you are editing 25fps all the way.
There isn’t one. Pressing DELETE gets rid of the clip (BUT NOT THE MEDIA) from the browser, or the bin. But there is nothing like that TRASH can that I have seen.