Mimic clumsy person (3)
I believe the answer is:
ape
This clue is a double definition.
'mimic' is the first definition.
(ape can mean to copy or imitate)
'clumsy person' is the second definition.
(I've seen this in another clue)
(Other definitions for ape that I've seen before include "Closely follow" , "drill" , "Our cousin" , "Idiot" , "Mimic the primate" .)