One of those in The House, presumably the corridor of power, for example (4)

I believe the answer is:

hall

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'corridor of power for example' is the definition.
'hall' can be an answer for 'corridor' (hall is a kind of corridor). I am not certain of the 'of power for example' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for hall that I've seen before include "Large house (linked to Dotheboys, Wildfell and Toad)" , "Foyer" , "Large meeting room" , "College dinner; passage" , "Toad ___ (Toad's home)" .)

I've seen this clue in The Irish Times.

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