Former name of Iran (6)

I believe the answer is:
persia
'former name of iran' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for persia that I've seen before include "Iran, formerly" , "Old land" , "It's now known as Iran" , "Former name of Iran" , "Old name for country at 25 Across" .)