Imitate primate (3)
I believe the answer is:
ape
This clue is a double definition.
'imitate' is the first definition.
(synonyms)
'primate' is the second definition.
(large primate)
(Other definitions for ape that I've seen before include "Primate resembling a human" , "Send up" , "Mimic the primate" , "drill" , "Copy - primate" .)