Tehran's home (4)
I believe the answer is:
iran
'tehran's home' 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 "Country where ayatollahs replaced a shah" , "Tehran is its capital" , "Country where the official language is Farsi" , "Islamic republic on the Persian Gulf" , "Modern name for Persia" .)