Crossword Genius

Henpecked husband's stable inmate? (3)

Ross

I believe the answer is:

nag

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

This clue might be a double definition.

'henpecked husband's stable' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'inmate?' is the second definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?

Can you help me to learn more?

(Other definitions for nag that I've seen before include "The horse to annoy continually" , "Remind constantly" , "Ailing horse" , "Henpeck like old horse" , "Constantly scold - small horse" .)

I've seen this clue in The Irish Independent.
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