Related Clues:

• Covert agent
• Plant of a sort
• Ogling person
• Be a mole
• Maxwell Smart, e.g.
• Stratego piece (3)
• Bond, e.g
• One making a visual assessment
• Washington D.C.'s International ___ Museum
• Government agent
• Watch furtively
• Mole, for example
• One checking out?
• One who's 'just looking'
• Admirer from a distance