Iran formerly (6)

I believe the answer is:

persia

'iran formerly' 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 "Old Iran" , "Former name of Iran" , "Iran, formerly" , "Praise be to ancient Iran" , "Old name for country at 25 Across" .)

I've seen this clue in the New York Times, The Times, the Newsday.com, The Mirror and The Guardian.

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