Topless, move rhythmically on pole, maybe (9)
I believe the answer is:
perchance
'maybe' is the definition.
('perchance' can be a synonym of 'maybe')
'topless move rhythmically on pole' is the wordplay.
'topless' means to remove the first letter.
'move rhythmically' becomes 'dance' (I've seen this before).
'on' means one lot of letters go next to another.
'pole' becomes 'perch' ('perch' can be a synonym of 'pole'**).
'dance' with its initial letter removed is 'ance'.
'ance' put after 'perch' is 'PERCHANCE'.
(Other definitions for perchance that I've seen before include "Maybe (to dream? - Hamlet)" , "possibly" , "'To sleep: -------- to dream:' Hamlet" , "As it may happen" .)