Where shopping might be secured (2,3,3)
I believe the answer is:
in the bag
I believe this clue is a double definition.
'where shopping might be' is the first definition.
(in a shopping bag)
'secured' is the second definition.
(I've seen this before)
(Other definitions for in the bag that I've seen before include "Sacked" , "Guaranteed" , "Where you may find tea" , "Informally secured as one wished" , "as cat before secret has been divulged?" .)