Dealer in foodstuffs (6)
I believe the answer is:
grocer
'dealer in foodstuffs' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for grocer that I've seen before include "Dealer in foodstuffs and household goods" , "Retail merchant" , "Provisions purveyor" , "Provision merchant" , "Food supplier" .)