Waffle, sweetened food (7)
I believe the answer is:
rhubarb
'food' is the definition.
(rhubarb is a kind of food)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for rhubarb that I've seen before include "Garden plant with reddish, edible stalks" , "Plant in the dock family" , "Plant with edible leaf stalk" , "Low-level racket" , "Vegetable used as fruit" .)