Chimp or orang (3)
I believe the answer is:
ape
I believe this clue is a double definition.
'chimp' is the first definition.
(chimpanzees are apes)
'orang' is the second definition.
(I've seen this in another clue)
(Other definitions for ape that I've seen before include "Mimic the primate" , "Closely follow" , "Idiot" , "Imitate like primate" , "Simulate" .)