Like upper Nile region with Vikings perhaps in charge (8)
I believe the answer is:
sudanese
'in charge' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'like upper nile region with vikings' is the wordplay.
'like upper nile region' becomes 'sue' (I can't explain this - if you can you should believe this answer much more).
'with' means one lot of letters goes inside another.
'vikings' becomes 'danes' (I've seen this before).
'sue' placed around 'danes' is 'SUDANESE'.
'perhaps' acts as a link.
Can you help me to learn more?
(Other definitions for sudanese that I've seen before include "African inhabitants" , "Of Khartoum, say" , "From Khartoum, perhaps" , "People in country" , "Bad danseuse from a northeastern African state" .)