1d) Bentham's theory combines endless futility and heresy (14)
2d) One enters Buddhist temple to serve (4)
9a) Bingo! Bachelor's first to get pie-eyed (6)
11a) He's present at part of St. Andrews about to finish (8)
22a) Sweet radical French friend wearing tatty suit (8)
Apology for no letters. All help much appreciated.
Best thanks to scorpiojo, michaelmph and retrocop for your prompt and very informative responses. 'Best Answer' an honourable draw between michaelmph and retrocop.