Grainier image wasn't right for the country (7)
I believe the answer is:
nigeria
'grainier image wasn't' is the definition.
The definition suggests a singular noun which matches the answer.
'right for the country' is the wordplay.
'right' becomes 'ia' (I can't explain this - if you can you should give a lot more credence to this answer).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'the country' becomes 'niger' (African country).
'ia' put after 'niger' is 'NIGERIA'.
Can you help me to learn more?
(Other definitions for nigeria that I've seen before include "African country, capital Abuja" , "Possible home for African" , "West African state" , "African republic, capital Abuja" , "Republic in West Africa" .)