Article Olga edited in the country (6)
I believe the answer is:
'the country' is the definition.
(Angola is an example)
'article olga edited in' is the wordplay.
'article' becomes 'an' (indefinite article).
'edited' indicates anagramming the letters.
'in' means one lot of letters goes inside another.
'olga' with letters rearranged gives 'gola'.
'an' inserted within 'gola' is 'ANGOLA'.
(Other definitions for angola that I've seen before include "SW African republic, capital Luanda" , "SW African nation" , "South-west African country, capital Luanda" , "Republic of SW Africa" , "African country, former Portuguese colony" .)