Artist's models who barely earn a living? (5)

I believe the answer is:

nudes

I'm a little stuck... Click here to teach me more about this clue!

'artist's models' is the definition.
The answer and definition can be both people as well as being plural nouns.
Maybe there's an association between them I don't understand?

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

Can you help me to learn more?

(Other definitions for nudes that I've seen before include "They're uncovered" , "Naked figures in paintings" , "People without clothes on" , "They wear nothing" , "Revealing paintings?" .)

I've seen this clue in The Globe and Mail.

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