Retire unexpectedly with a country (7)
I believe the answer is:
eritrea
'country' is the definition.
(I know that Eritrea is African country)
'retire unexpectedly with a' is the wordplay.
'unexpectedly with' indicates anagramming the letters.
'retire' mixed up with 'a' gives 'ERITREA'.
(Other definitions for eritrea that I've seen before include "Eire art (anag)" , "Country to the north of Ethiopia" , "NE African state" , "State north of Ethiopia" , "East African country" .)