Initiative to go into force (10)
I believe the answer is:
enterprise
'initiative' is the definition.
('enterprise' can be a synonym of 'initiative')
'go into force' is the wordplay.
'go into' becomes 'enter' ('enter' can be a synonym of 'go into').
'force' becomes 'prise' (I've seen this before).
'enter'+'prise'='ENTERPRISE'
'to' is the link.
(Other definitions for enterprise that I've seen before include "Company" , "audacity" , "New project" , "Bold resourcefulness" , "Data may be on-board here" .)