Capitals of Romania, Wisconsin and a country in Africa (6)
I believe the answer is:
rwanda
'country in africa' is the definition.
(African nation)
'capitals of romania wisconsin and a' is the wordplay.
'capitals of' indicates taking the first letters.
The initial letters of 'romania wisconsin' is 'rw'.
'rw'+'and'+'a'='RWANDA'
(Other definitions for rwanda that I've seen before include "Scene of a genocide in 1994" , "African country, capital Kigali" , "Republic in central Africa" , "African state" , "Central African country" .)