Plan; plot (6)
I believe the answer is:
I believe this clue is a double definition.
'plan' is the first definition.
(I know that scheme is a more specific form of the action plan)
'plot' is the second definition.
(I know that scheme is a more specific form of the action plot)
(Other definitions for scheme that I've seen before include "System or strategy" , "Program" , "Systematic plan or arrangement" , "Wheel and deal" , "Hatch - plot" .)