Crossword Genius

Smoky city (6)

Ross

I believe the answer is:

havana

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'city?' is the definition.
(Havana is an example)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for havana that I've seen before include "Cuban capital - cigar" , "Cuba's capital" , "city" , "Smoke" , "Fine cigar" .)

I've seen this clue in the Evening Standard.
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