Revolutionary procedure reveals colour scheme (5)
I believe the answer is:
decor
'colour scheme' is the definition.
(I've seen this before)
'revolutionary procedure reveals' is the wordplay.
'revolutionary' says the letters should be written in reverse.
'reveals' says the answer is hidden in the clue.
'roced' can be found hidden inside 'procedure'.
'roced' backwards is 'DECOR'.
(Other definitions for decor that I've seen before include "Interior design; stage scenery" , "Internal ornamentation" , "(Room) design" , "Interior colour scheme and furnishing" , "Choice of colour" .)