Guide to Mr Poe's badly built abode, perhaps? (5)

I believe the answer is:

usher

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'guide' is the definition.
(an usher guides people)

I cannot understand how the remainder of the clue works.

(Other definitions for usher that I've seen before include "One who should lead the way" , "Guide at wedding" , "Official doorkeeper or guide" , "Person showing one to a seat" , "One who shows people to seats" .)

I've seen this clue in The Irish Times.

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