Bare-chested (7)
I believe the answer is:
topless
'bare-chested' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for topless that I've seen before include "Wearing no clothing above the waist" , "Revealing" , "Without a shirt, vest or bra?" , "Leaving the breasts uncovered" , "As a Page Three girl?" .)