Entertainer's energy supporting painter (7)

I believe the answer is:

artiste

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'entertainer's' is the definition.
(artiste is a kind of entertainer)

I don't understand the rest of the clue.

(Other definitions for artiste that I've seen before include "Attires for professional entertainer" , "Entertainer, singer or dancer" , "A sitter for a performer" , "nightclub entertainer?" , "'Public performer, dancer or singer (7)'" .)

I've seen this clue in The Telegraph.

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