Where Farsi is spoken (4)
I believe the answer is:
iran
'where farsi is spoken' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for iran that I've seen before include "Tehran is its capital" , "It used to be Persia" , "Islamic republic on the Persian Gulf" , "Country where ayatollahs replaced a shah" , "Former Persia" .)