Ape, close relative of man (10)
I believe the answer is:
chimpanzee
This clue is a double definition.
'ape' is the first definition.
(I know that chimpanzee is a type of great ape)
'close relative of man' is the second definition.
(I've seen this before)
(Other definitions for chimpanzee that I've seen before include "animal" , "African ape with advanced intelligence" , "Anthropoid ape" , "MONKEY" , "Close relative of man" .)