No spring chicken daring to go topless (3)
I believe the answer is:
old
'no spring chicken' is the definition.
(I've seen this in another clue)
'daring to go topless' is the wordplay.
'daring' becomes 'bold' (I've seen this before).
'to go topless' means to remove the first letter.
'bold' with its initial letter taken away is 'OLD'.
(Other definitions for old that I've seen before include "Advanced in years" , "Long in the tooth" , "Much-used" , "Stale" , "At an early stage - at a late stage" .)