City rebellion ultimately avoided (3)

I believe the answer is:

rio

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'city' is the definition.
(Rio de Janeiro)

I can't explain the rest of the clue.

(Other definitions for rio that I've seen before include "Erstwhile home of Biggs" , "(Golfer) in the sand" , "place of carnival" , "A Mexican river, may be grande" , "Location of next Olympic Games, in short" .)

I've seen this clue in The Sun.

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