Bread picked up in store (5)
I believe the answer is:
cache
'store' is the definition.
(cache is a kind of store)
'bread picked up' is the wordplay.
'bread' becomes 'cash' (I've seen this in another clue).
'picked up' shows a homophone (sound like).
'cash' is a homophone of 'CACHE'.
'in' is the link.
(Other definitions for cache that I've seen before include "Hidden storage place" , "Collection of hidden things" , "Secret hiding place" , "(Place in) hidden store" , "Secret source" .)