Charm displayed by liking going topless (7)
I believe the answer is:
enchant
'charm' is the definition.
(enchanting is a kind of charming)
'liking going topless' is the wordplay.
'liking' becomes 'penchant' (penchant is a kind of liking).
'going topless' means to remove the first letter.
'penchant' with its initial letter taken away is 'ENCHANT'.
'displayed by' is the link.
(Other definitions for enchant that I've seen before include "Delight or bewitch" , "Captivate, charm" , "Hypnotise" , "Fascinate - delight" , "Delight, cast spell over" .)