Food returned with one bad sprout (7)
I believe the answer is:
burgeon
'sprout' is the definition.
(I've seen this before)
'food returned with one bad' is the wordplay.
'food' becomes 'grub' (grub is a kind of food).
'returned' shows that the letters should be reversed in order.
'with' means one lot of letters go next to another.
'bad' indicates anagramming the letters.
'grub' backwards is 'burg'.
'one' anagrammed gives 'eon'.
'burg'+'eon'='BURGEON'
(Other definitions for burgeon that I've seen before include "Shoot" , "Grow, rapidly increase" , "sprout" , "swell" , "Grow and flourish" .)