Some primates (4)
I believe the answer is:
apes
'some primates' is the definition.
(ape is a kind of primate)
This is the entire clue.
(Other definitions for apes that I've seen before include "Copies the primates?" , "Species of primate" , "Zoo animals" , "Imitates in every aspect" , "Imitates like primates" .)