Food in abundance (3)
I believe the answer is:
bun
'food' is the definition.
(bun is a kind of food)
'in abundance' is the wordplay.
'in' indicates the answer is hidden within the clue.
'BUN' can be found hidden inside 'abundance'.
(Other definitions for bun that I've seen before include "Kind of small round cake" , "Hair in tight coil" , "Small cake; hair style" , "Tied hair" , "One from Chelsea" .)