Related Clues:

• Snoop
• Look through a keyhole
• Peeper
• Good looker?
• Herbicide's target
• Look in (on)
• Le Carré staple
• Watch secretly
• Finder of secrets
• Mole, maybe
• It's often rooted out
• Nut sedge, e.g.
• Bug someone, e.g.
• Catch a glimpse of
• Stratego piece