Fatter one's abandoned food store (6)
I believe the answer is:
larder
'food store' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for larder that I've seen before include "Food store" , "Store cupboard" , "Person applying grease" , "Room or cupboard for storing food" , "Room or cupboard for food storage" .)