Blessing well in West African country (7)
I believe the answer is:
benison
'blessing' is the definition.
(benison is a kind of blessing)
'well in west african country' is the wordplay.
'well' becomes 'so' (both can mean extremely).
'in' is an insertion indicator.
'west african country' becomes 'benin' (country in West Africa).
'so' inserted into 'benin' is 'BENISON'.
(Other definitions for benison that I've seen before include "Thanksgiving" , "Sob, nine turn into a blessing" , "Benediction" .)