Right to deploy plan (4)
I believe the answer is:
ruse
'plan' is the definition.
(I have seen 'Cunning plan' mean 'ruse' so perhaps 'plan' could also mean 'ruse')
'right to deploy' is the wordplay.
'right' becomes 'r' (abbreviation).
'to deploy' becomes 'use' (I've seen this before).
'r'+'use'='RUSE'
(Other definitions for ruse that I've seen before include "Sue to be a ploy" , "Plan intended to deceive" , "Cunning scheme" , "Deceptive tactic" , "Sure to be a trick" .)