"African revolutionary" a typing error, originally (8)
I believe the answer is:
egyptian
'african' is the definition.
(Egyptian is an example)
'revolutionary a typing error originally' is the wordplay.
'revolutionary' indicates anagramming the letters.
'originally' indicates taking the first letters.
The first letter of 'error' is 'e'.
'a'+'typing'+'e'='atypinge'
'atypinge' with letters rearranged gives 'EGYPTIAN'.
(Other definitions for egyptian that I've seen before include "Like a type of goose" , "North-east African" , "Nationality of citizen of Cairo" , "New African democrat" , "Strange tiny page for the nationality" .)