Can anyone help with my last three?
11a: Nick: his cock touching on nipsy originally, lying back (5)
N_T _ _
Thought it could be NOTUM but not sure how that works.
27a / 3d: Shift round leviathan's rear, huge bird Peg being taken from behind - tickling inside chamber of horrors (9,4)
S_ _ _ T _ O _ N / _ T _ _
Sweetcorn something?
28d: Show old turd, snipped off at the bottom (4)
Thanks in advance!