Food retailer (6)
I believe the answer is:
grocer
'food retailer' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for grocer that I've seen before include "Seller of food and household supplies" , "One supplying households" , "Shopkeeper selling food" , "Dealer in foodstuffs and household goods" , "Market trader" .)