Imitator (7)
'imitator' is the definition.
(synonyms)
This is all the clue.
(Other definitions for copycat that I've seen before include "Person imitating others" , "Done in imitation" , "One imitating another" , "Plagiarist possibly" , "Person (or crime) imitating another" .)
'imitator' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for aper that I've seen before include "One creating copies" , "copyist" .)