Credit cards still remain pocketed (7)
I believe the answer is:
plastic
'credit cards' is the definition.
(I've seen this before)
'still remain pocketed' is the wordplay.
'still' becomes 'pic' (short for picture).
'remain' becomes 'last' (I've seen this in another clue).
'pocketed' is an insertion indicator.
'pic' placed around 'last' is 'PLASTIC'.
(Other definitions for plastic that I've seen before include "Compliant" , "Flexible - synthetic material" , "credit may be on it" , "Lips act as a synthetic material" , "Credit card; mouldable" .)