I have some answers (hopefully!) but can't parse thoroughly thus missing extra letters:
1a fairy unfit to follow through... i have PERI ...per = through but the rest?
24a Exhausted alibi taken to upset legal principle ...RATIO ?
28d What pricks receipted lover, cutting the odds? ... ihave EPEE... can see odd letters of receipted reversed would give E P E E but...
8a Benedictine nun chasing a man from sacred garden (4) A??M
ADAM could be the man from sacred garden ??