Revolutionary massage for infant (6)
I believe the answer is:
cherub
'infant' is the definition.
(cherub is a kind of infant)
'revolutionary massage' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'massage' becomes 'rub' (I've seen this before).
'che'+'rub'='CHERUB'
'for' is the link.
(Other definitions for cherub that I've seen before include "Angelic baby" , "Sweet, innocent child" , "Innocent youngster" , "Lovely child" , "Little angel" .)