Based purely on what I've read on this site, I would say:
The clue for 11d bears no relation to the solution, 'Cautious, meticulous (7)' being a (very accurate) clue for CAREFUL. The entry must surely be PRIVATE MEMBER.
The similarly clue-deficient 56a would appear to be a choice between (a) SWINGLETREE, (b) TWINKLETOES and (c) TWINKLE-TOED. Collins gives only (a), Chambers gives (a) and (b), the Oxford Dictionary gives (a) and (c), The Shorter OED gives them all, and the OED (the big one) gives only (a). Good luck!!