Crossword Genius

Sort of party you could have in Southend (3)

Ross

I believe the answer is:

hen

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

'sort of party' is the definition.

'you could have in southend' is the wordplay.
'HEN' is hidden within the letters.
But, I am uncertain how this is indicated.

Can you help me to learn more?

(Other definitions for hen that I've seen before include "Composed of women" , "Source of eggs" , "Female bird" , "Clucking female" , "This party is for women only" .)

I've seen this clue in the Evening Standard.
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