Sibyl is confused about article for North Africans (7)
I believe the answer is:
libyans
'africans' is the definition.
(Libyan is an example)
'sibyl is confused about article for north' is the wordplay.
'is confused' indicates anagramming the letters.
'about' is an insertion indicator.
'article' becomes 'a' (English indefinite article).
'for' means one lot of letters go next to another.
'north' becomes 'n' (abbreviation).
'sibyl' with letters rearranged gives 'libys'.
'a'+'n'='an'
'libys' going around 'an' is 'LIBYANS'.
(Another definition for libyans that I've seen is " Africans".)