Big Ben ____ is a replica clocktower in a former British Empire territory (4)

I believe the answer is:

aden

(Other definitions for aden that I've seen before include "Port city of Yemen" , "Dean out in the seaport city" , "Strange Dane to be in the Yemen" , "Main port of Yemen" , "Commercial capital of Yemen" .)

I've seen this clue in The Times and The Sunday Times.

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