Definition that contains clandestine operation
- sas a specialist regiment of the British army that is trained in commando techniques of warfare and used in clandestine operations (especially against terrorist groups)
- special air service a specialist regiment of the British army that is trained in commando techniques of warfare and used in clandestine operations (especially against terrorist groups)
- action officer the case officer designated to perform an act during a clandestine operation (especially in a hostile area)