secret agent intelligence

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

foreign secret agent

be drawn from secret intelligence

Australian Secret Intelligence Service (ASIS)

agent / agent network / agents

CW agent (chemical warfare agent)

obscurant agent (vision-restricting agent)

damage agent / damaging agent

secret (security classification)

secret

secret internet protocol router network (SIPRNET)

secret service

top secret (security classification)

top secret

state secret

be marked top secret

give away the secret by careless talk

clear secret

clearance for top secret work

secret clearance

secret defense service

secret language

secret post

secret qualification clearance

secret security clearance

secret text

secret weapon

microdot secret writing

agent inside the intelligence service

agent with intelligence service

counter-intelligence agent

agent (intelligence)