Reportedly rubbish sentence that's expanded by food (9)
I believe the answer is:
waistline
'food' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for waistline that I've seen before include "Swine tail (anag.)" , "measurement" , "Girth" , "It goes round trunk" .)