Related Clues:

• One wearing a wire, perhaps
• Word repeated in Mad magazine's '___ vs. ___'
• Telephoto-lens user, perhaps
• Use binoculars, perhaps
• One who's in your business?
• 'Mission: Impossible' figure
• Mind another's business
• Smiley or Smart
• Bond, e,g.
• Dead body
• Napoleon Solo, e.g.
• Cloak-and-dagger figure
• Nathan Hale, e.g.
• Passer of secret documents
• Mole with secrets