See attitude (going topless) as immoral (5)
I believe the answer is:
loose
'immoral' is the definition.
(thesaurus)
'see attitude going topless' is the wordplay.
'see' becomes 'lo' (archaic word meaning 'look!').
'attitude' becomes 'pose' (I've seen this before).
'going topless' means to remove the first letter.
'pose' with its initial letter removed is 'ose'.
'lo'+'ose'='LOOSE'
'as' acts as a link.
(Other definitions for loose that I've seen before include "Unattached" , "Not fitting tightly" , "Untie(d)" , "Water heater" , "(Of a garment) a size too big?" .)