Deal in an abandoned food shop (4)
I believe the answer is:
'food shop' is the definition.
(short for delicatessen)
'deal in an abandoned' is the wordplay.
'abandoned' suggests deleting specific letters.
'dealin' with 'an' taken away is 'DELI'.
(Other definitions for deli that I've seen before include "Special shop" , "Fine food shop" , "Exotic food shop" , "food-store?" , "Unusual food shop" .)