Mail sorted for West African country (4)
I believe the answer is:
mali
'west african country' is the definition.
(country in West Africa)
'mail sorted' is the wordplay.
'sorted' is an anagram indicator.
'mail' with letters rearranged gives 'MALI'.
'for' is the link.
(Other definitions for mali that I've seen before include "African country, former French colony" , "W. African country" , "Timbuktu is in this landlocked country" , "Country of West Africa" , "Send mail out to Africa" .)