Being naked, wear thin plastic (2,3,3)
I believe the answer is:
in the raw
'being naked' is the definition.
(I've seen this in another clue)
'wear thin plastic' is the wordplay.
'plastic' is an anagram indicator (plastic can mean easily moulded).
'wear'+'thin'='wearthin'
'wearthin' is an anagram of 'IN THE RAW'.
(Other definitions for in the raw that I've seen before include "Naked, or without refining influence" , "Nude - or served uncooked" , "Undressed" , "without clothing at last?" , "Completely unclothed" .)