Crossword Genius

She's in egg production (3)

Ross

I believe the answer is:

hen

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

This clue might be a double definition.

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

'egg production' is the second definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'in' acts as a link.

Can you help me to learn more?

(Other definitions for hen that I've seen before include "Domestic fowl" , "Domestic egg layer" , "This party is for women only" , "Not cock" , "Clucking female" .)

I've seen this clue in the Evening Standard.
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