Left Spain and Portugal for part of Africa (7)
I believe the answer is:
liberia
'for part of africa' is the definition.
(African nation)
'left spain and portugal' is the wordplay.
'left' becomes 'l' (common abbreviation).
'spain and portugal' becomes 'iberia' (I've seen this before).
'l'+'iberia'='LIBERIA'
(Other definitions for liberia that I've seen before include "W African Republic" , "Monrovia's country" , "African republic, capital Monrovia" , "part of Africa" , "State" .)