Related Clues:

• Mata Hari, for one
• Secret agent
• Undercover sort
• Mole
• Tail, maybe
• Sight
• Kind of glass
• Austin Powers, e.g
• One giving the once-over
• Cloak-and-dagger type
• Wire wearer
• Hale, for one
• Mole, e.g
• ''I ___'' (classic TV show)
• Lascivious looker