Parrot's masterly imitation of a crow (5)

I believe the answer is:

macaw

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'parrot's' is the definition.
(macaw is a kind of parrot)

I don't understand the rest of the clue.

(Other definitions for macaw that I've seen before include "Tropical bird" , "brilliant winger" , "Largest parrot" , "Colourful creature" , "colourful flyer" .)

I've seen this clue in the Evening Standard.

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