Shopkeeper more overweight, might one say? (6)
I believe the answer is:
grocer
'shopkeeper' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for grocer that I've seen before include "Seller of food and household supplies" , "Retailer of food and small household goods" , "Retail merchant" , "Market trader" , "Food merchant" .)