Nudity could be seen as sluttish (6)
I believe the answer is:
untidy
'sluttish' is the definition.
(similar in meaning)
'nudity could be' is the wordplay.
'could be' indicates anagramming the letters.
'nudity' with letters rearranged gives 'UNTIDY'.
'seen as' is the link.
(Other definitions for untidy that I've seen before include "Dishevelled, messy" , "Cluttered" , "Not neat or orderly" , "Not inclined to be neat" , "Messy, not neat" .)