City rebellion time forgot (3)
I believe the answer is:
rio
'city' is the definition.
(Rio de Janeiro)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for rio that I've seen before include "Manchester United player in South American city, in short?" , "Brazilian city and port" , "(Golfer) in the sand" , "old capital" , "- Ferdinand, footballer" .)