Question revolutionary about everybody English (9)
I believe the answer is:
challenge
'question' is the definition.
(I've seen this before)
'revolutionary about everybody english' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'about' means one lot of letters goes inside another.
'everybody' becomes 'all' (I've seen this before).
'english' becomes 'eng' (abbreviation).
'all'+'eng'='alleng'
'che' placed around 'alleng' is 'CHALLENGE'.
(Other definitions for challenge that I've seen before include "call for proof" , "Invite to contest, throw down the gauntlet" , "Disagree!" , "difficulty" , "Dispute (a statement)" .)