Friday, perhaps (3)

I believe the answer is:

man

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'friday' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for man that I've seen before include "Isle of . . ., . . . o' war" , "Irish Sea isle" , "Chap" , "The most destructive and polluting animal" , "Bloke" .)

I've seen this clue in the Evening Standard.

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