French city that was formerly the capital of the Duchy of Lorraine (5)

I believe the answer is:

nancy

(Other definitions for nancy that I've seen before include "No Man" , "Bill Sikes's girl (Dickens)" , "Girl; French city" , "one of the Mitford sisters" , "Birthplace of Edmond de Goncourt" .)

I've seen this clue in The Independent.

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