Dolly, an artist’s model (6)

I believe the answer is:

sitter

This clue is a double definition.

'dolly' is the first definition.
(I've seen this before)

'an artist's model' is the second definition.
(I've seen this before)

(Other definitions for sitter that I've seen before include "One minds the baby" , "Easy shot or catch" , "A poser" , "broody type" , "one rarely missed?" .)

I've seen this clue in The Times.

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