Post at the end of a flight (5)

I believe the answer is:

newel

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'post' is the definition.
(I know that newel is a type of post)

I don't understand the remainder of the clue.

(Other definitions for newel that I've seen before include "domestic post" , "Post of winding stairs" , "Post at base of staircase" , "Main post supporting handrail on stairs" , "Support post for stair rail" .)

I've seen this clue in the Evening Standard.

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