Start to see me about revolutionary action plan (6)
I believe the answer is:
'action plan' is the definition.
(a scheme is a plan of action)
'start to see me about revolutionary' is the wordplay.
'start to' says to take the initial letters.
'about' is a charade indicator (letters next to each other).
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
The first letter of 'see' is 's'.
'me' put after 'che' is 'cheme'.
(Other definitions for scheme that I've seen before include "Hatch - plot" , "Machination" , "Elaborate and systematic plan of action" , "Conive, intrigue" , "Cunning plan" .)