King Kong, for one (3)
I believe the answer is:
ape
'king kong for one' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ape that I've seen before include "Monkey" , "Closely follow" , "drill" , "Imitate, clumsy person (colloq.)" , "Parrot" .)