Feast in fruit for large animal (5,3)
I believe the answer is:
great ape
'large animal' is the definition.
'feast in fruit' is the wordplay.
'feast' becomes 'eat' (I've seen this in another clue).
'in' is an insertion indicator.
'fruit' becomes 'grape' (grape is a kind of fruit).
'eat' going within 'grape' is 'GREAT APE'.
'for' acts as a link.
(Other definitions for great ape that I've seen before include "Close relative to humans" , "Wild animal" , "Eg, gorilla, chimpanzee" , "Large primate" , "Gorilla, perhaps" .)