Birdman?

I believe the answer is:

robin

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'birdman?' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see an association between them that I can't see?

This is all the clue.

Can you help me to learn more?

(Other definitions for robin that I've seen before include "See 7" , "Bird - boy's name" , "Bird; man's name" , "flier" , "Friendly winter bird" .)

I've seen this clue in The Irish Independent.

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