At Leatherhead, Henry's posh house (4)

I believe the answer is:

hall

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'posh house' is the definition.
'hall' can be an answer for 'house' (hall is a kind of house). I am not sure about the 'posh' bit.

'at leatherhead henry's' is the wordplay.
'at' is a charade indicator (letters next to each other).
'leatherhead' becomes 'l' (head letter of 'leather').
'henry' becomes 'hal' (short for Henry).
'l' put after 'hal' is 'HALL'.

Can you help me to learn more?

(Other definitions for hall that I've seen before include "Chamber" , "College dining room" , "Large country house" , "Building used for public assembly" , "Large house (linked to Dotheboys, Wildfell and Toad)" .)

I've seen this clue in the Evening Standard.

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