Finishes off masterstroke, N English dish and N African one (8)
I believe the answer is:
couscous
'one' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for couscous that I've seen before include "African dish of crushed and steamed wheat" , "Kind of African semolina" , "Semolina grains" , "African dish of crushed steamed semolina" , "Form of semolina" .)