2016 Olympics city, for short (3)
I believe the answer is:
rio
'2016 olympics city for short' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rio that I've seen before include "Spanish word for river" , "- Ferdinand, footballer" , "old capital" , "Manchester United player in South American city, in short?" , "A Mexican river - like Grande" .)