Answer:

aper

Answer	Crossword Clue
APER	Copy-cat
APER	Mimic
APER	Copycat

APER	Imitator
APER	Little, for one
APER	Rich Little, e.g.
APER	Inpersonator
APER	Impressionist
APER	Little or Short
APER	Parodist
APER	Parrot, at times

APER	Simon Says player
APER	One seeing and doing
APER	Mimic in action
APER	Mimicry specialist
APER	One doing imitations
APER	Unoriginal one
APER	Seer-and-doer
APER	Mimic at work

APER	Mimicker
APER	Parrot
APER	Copier
APER	Frank Gorshin, for one
APER	One making faces, maybe
APER	One taking off
APER	One making a good impression?
APER	One doing monkey business?

APER	Dana Carvey, at times
APER	Mime
APER	One who's often not himself?
APER	Impersonator
APER	One executing a takeoff?
APER	Me-tooer
APER	One good at takeoffs
APER	"Monkey see, monkey do" practitioner

APER	Mimicking one
APER	One who lacks originality
APER	Takeoff artist
APER	Imitative sort
APER	Rich Little, while doing his act