Tender chest, topless (5)
I believe the answer is:
offer
'tender' is the definition.
('offer' can be a synonym of 'tender')
'chest topless' is the wordplay.
'chest' becomes 'coffer' (coffer is a kind of chest).
'topless' means to remove the first letter.
'coffer' with its initial letter removed is 'OFFER'.
(Other definitions for offer that I've seen before include "Provide (an opportunity)" , "Proposition" , "Sum of money proposed as payment" , "Submit" , "show" .)