Revolutionary touring a radical pantomime (7)
I believe the answer is:
charade
'pantomime' is the definition.
(thesaurus)
'revolutionary touring a radical' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'touring' means one lot of letters goes inside another (touring can mean going round).
'radical' becomes 'rad'.
'a'+'rad'='arad'
'che' going around 'arad' is 'CHARADE'.
(Other definitions for charade that I've seen before include "An absurd pretence, could be a game" , "Word-guessing riddle" , "Had care in the acted riddle" , "sham" , "Ludicrous pretence" .)