Related Clues:

• Alias user
• Caleb, for one
• Peek through a keyhole
• Mad antagonist
• "Tinker, Tailor, Soldier, ___"
• Intelligence seeker
• A couple of pounds for the lot
• Keep watch
• Many a bugger
• Le Carre creation
• Plant or mole
• Saskatchewan's ____ Hill
• Dangerous job
• Use a peephole, say
• 007, e.g