Someone from Mumbai, for example, a state (7)
I believe the answer is:
indiana
'state' is the definition.
(Indiana is an example)
'someone from mumbai for example a' is the wordplay.
'someone from mumbai for example' becomes 'indian'.
'indian'+'a'='INDIANA'
(Other definitions for indiana that I've seen before include "state of America" , "American state" , "Gary's place" , "State of central US" , "State of southern US" .)