Scheme, strategy (4)
I believe the answer is:
plan
I believe this clue is a double definition.
'scheme' is the first definition.
(synonyms)
'strategy' is the second definition.
(a strategy is a plan or tactic)
(Other definitions for plan that I've seen before include "Agenda" , "Schedule" , "Map; intention" , "Arrangement" , "Contrive" .)