Revolutionary to chafe a little angel (6)
I believe the answer is:
cherub
'a little angel' is the definition.
(I've seen this before)
'revolutionary to chafe' is the wordplay.
'revolutionary' becomes 'Che' (Che Guevara the Marxist revolutionary).
'to chafe' becomes 'rub' ('rub' can be a synonym of 'chafe').
'che'+'rub'='CHERUB'
(Other definitions for cherub that I've seen before include "Little angel" , "High-ranking angel" , "Baby angel" , "innocent-looking child" , "innocent young thing" .)