Any number in punt that's leaning (4)
I believe the answer is:
bent
'that's leaning' is the definition.
(I've seen this in another clue)
'any number in punt' is the wordplay.
'any number' becomes 'n' (mathematical symbol for an unspecified number).
'in' is an insertion indicator.
'punt' becomes 'bet' (I've seen this in other clues).
'n' put within 'bet' is 'BENT'.
(Other definitions for bent that I've seen before include "Deformed" , "Natural skill to be slangily dishonest?" , "Twisted or determined" , "Morally crooked" , "Warped" .)