secret security clearance

clearance for top secret work

secret clearance

secret qualification clearance

secret (security classification)

top secret (security classification)

incompatible with holding security clearance

security clearance

secret

secret agent intelligence

Secret Intelligence Service (SIS) / Military Intelligence, Section 6 (MI6)

secret internet protocol router network (SIPRNET)

secret service

top secret

state secret

be drawn from secret intelligence

be marked top secret

foreign secret agent

give away the secret by careless talk

clear secret

secret defense service

secret language

secret post

secret service

secret text

secret weapon

security agreement (information security, NATO)

air traffic clearance

clearance decontamination

clearance time

debris clearance

diplomatic clearance

fuselage and landing gear clearance zone