Impersonator of Manet, for example (13)

I believe the answer is:

impressionist

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'impersonator' is the definition.
(I know that impersonator is a type of impersonator)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for impressionist that I've seen before include "Painter such as Monet" , "one good at doing copies?" , "Mimic" , "Person pretending to be another" , "artist?" .)

I've seen this clue in The Times.

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