Food eaten by boys, terrible (6)
I believe the answer is:
oyster
'food' is the definition.
(I know that oyster is a meat)
'eaten by boys terrible' is the wordplay.
'eaten by' says the answer is hidden in the clue.
'OYSTER' can be found hidden inside 'boys terrible'.
(Other definitions for oyster that I've seen before include "offering unlimited possibilities?" , "Bivalve native" , "Tasty bivalve, may carry pearl" , "Flat shellfish" , "World as place of opportunity" .)