Iberian peninsula country (5)
I believe the answer is:
spain
'iberian peninsula country' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for spain that I've seen before include "EU country" , "European country" , "Pains badly to be in the country" , "It pains one to be out in this country" , "location of Estoril" .)