staged
apple cart
counterplan
latently
something nasty in the woodshed
top secret
underplot
in petto
occulted
connivance
secretly
shoot off at the mouth
draft
prearrangement
conspire
ectocrine
preplanned
design
clandestine operation
ill-conceived
ideate
spill the beans
forelay
clandestinely
covertness
whole ball of wax
confidentiality
planing
afterthought
subplan
secernent
plangence
hiddenness
hugger-mugger
skeleton in the cupboard
skeleton in the closet
microplanning
let something slip
wheeze
stitch-up
semi-planned
oplan
underhanded
give the game away
cryptadia