Leaving
11. Round ball, busy (
(anagram)
13. Must air turns fashionable (
(anagram)
23. Coat around a maths symbol (7) (mostly an anagram)
33. "Close up these ...... leaves" (6) (quote)
34. Ryan is about! (6) (anagram)
35. A slapstick pie (7) (as in the circus)
50. Whig turns back his refusal (6) (political no's)