LOL! Thanks Mrs T.
28A: Hmm, I've just tried using a French 'a' (plus accent) and making that fit any meaning of per but I can't.
OK, I've got the first 2 letters of 13A from your clue and my answer seems to be correct now I'm no longer trying to dishearten the singer! I can see who she is, too. But the last 3 letters: how do they equal the end of the clue? Sorry if I'm being really thick here.
Let's hope someone can enlighten us on 1A/1D. Meanwhile it's nice to be in the same boat...