Miro, say, just on arts news in lead items (4)

I believe the answer is:

joan

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'miro' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?

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

Can you help me to learn more?

(Other definitions for joan that I've seen before include "Darby and --, -- of Arc" , "- Plowright, actress" , "First name of the Maid of Orleans" , ". . . . of Arc, French warrior saint" , "Orleans girl" .)

I've seen this clue in The Independent.

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