In play, could be termed a city of gentlemen (6)

I believe the answer is:

verona

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'city of gentlemen' is the definition.
'Verona' can be an answer for 'city' (Verona is an example). I am not sure about the 'of gentlemen' bit.

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

Can you help me to learn more?

(Other definitions for verona that I've seen before include "City of NE Italy" , "Italian city (with two gentlemen)" , "Rave on in town of Romeo and Juliet" , "The Two Gentlemen of-(Shakespeare)" , "Romeo's city" .)

I've seen this clue in the Evening Standard.

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