Mumbai's country (5)
I believe the answer is:
india
'mumbai's country' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for india that I've seen before include "I identified on radio" , "New Delhi is its capital" , "It was once known as the Jewel in the Crown" , "Country: I (comms.)" , "Sub-continental country" .)