Naturists not getting any sun - presumably one will put on a coat? (6)

I believe the answer is:

artist

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'coat?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for artist that I've seen before include "Creative or skilful person" , "Rousseau perhaps" , "Creator of beauty" , "Constable possibly" , "Expert" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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