Artist who sounds cheerful (8)

I believe the answer is:

whistler

I believe this clue is a double definition.

'artist' is the first definition.
(painter James McNeill Whistler)

'who sounds cheerful' is the second definition.
(person whistling cheerfully)

(Other definitions for whistler that I've seen before include "Olympic ski resort" , "Siffleur - US painter, d. 1903" , "James ---, Rex ---, artists" , "referee" , "pretending to be brave in the dark?" .)

I've seen this clue in The Guardian.

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