Related Clues:

• Watch furtively
• Mole, for example
• Spy from within
• Spicy chocolate sauce
• Tunnel specialist
• Spy in the works
• Mole, perhaps
• Cover girl, e.g.?
• Ingrid in "Notorious," e.g.
• Unwelcome plant
• One undercover
• Chocolate sauce
• ABC gameshow baddie
• ABC's ''The ___''
• Hill-building beast