Pickle lids turned the wrong way (4)
I believe the answer is:
spot
'pickle' is the definition.
(I've seen this before)
'lids turned the wrong way' is the wordplay.
'lids' becomes 'tops'.
'turned the wrong way' shows that the letters should be reversed in order.
'tops' back-to-front is 'SPOT'.
(Other definitions for spot that I've seen before include "Place - zit" , "See; eruption" , "See - blemish" , "Dirty blemish" , "make out" .)