Pet with rage wrestling with a chimpanzee? (5,3)
I believe the answer is:
great ape
'chimpanzee?' is the definition.
(chimpanzee is a kind of great ape)
'pet with rage wrestling with a' is the wordplay.
'with' means one lot of letters go next to another.
'wrestling with' indicates anagramming the letters.
'pet'+'rage'='petrage'
'petrage' anagrammed with 'a' makes 'GREAT APE'.
(Other definitions for great ape that I've seen before include "orang-utan, for example" , "Large primate" , "Eg, gorilla, chimpanzee" , "Gorilla, perhaps" , "chimpanzee, for example" .)