Crossword Genius

African giant contrived to annex northern city (7)

Ross

I believe the answer is:

pompeii

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'city' is the definition.
(Pompeii is an example)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for pompeii that I've seen before include "Buried Roman city" , "Roman site" , "Vesuvius-buried town" , "Ancient site" , "Town buried by Vesuvius 1st century a.d." .)

I've seen this clue in The Telegraph.
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