Gibbons or gorillas (4)
I believe the answer is:
apes
I believe this is a double definition.
'gibbons' is the first definition.
(I've seen this in another clue)
'gorillas' is the second definition.
(I've seen this in another clue)
(Other definitions for apes that I've seen before include "Peas (anag)" , "Large primates" , "Copies the primates?" , "Species of primate" , "Mimics like primates" .)