Related Clues:

• One making sidelong glances
• One doing the looking
• One enjoying the sights
• Peeping Tom, e.g
• Good-looking person?
• One who checks you out
• One who's "just looking"
• Maker of a visual assessment
• Lecherous one, at times
• React, just barely
• One having a look
• Visual appraiser
• Spyglass user
• Ogler, essentially
• You right now, theme-wise