Related Clues:

• Surreptitious glance
• Move a finger or two, maybe
• Lift one's blindfold
• Ill-fated act by Lot's wife
• Sustain retiring spy
• Through-the-keyhole glimpse
• Break a yuletide rule
• Sneak ___ (preview)
• Cheat at blind man's buff
• Look between one's fingers
• Cheat in hide-and-seek
• Take a look, in a way
• Look to hold back
• Advance look, say
• ''Don't __!''