Related Clues:

• Preschool breaks
• Quick refreshers
• Catches some z's
• Silent endorsements
• Gets some shut-eye
• Quiet times for unlucky toddlers and very lucky grown-ups
• Moves one's head to the beat, say
• Quiet yeses
• Not a pretty sight on top of everything for the gamblers
• Says yes with one's head
• Signals in charades
• Signaled yeses
• Acknowledges silently
• They can mean 'yes'
• Signs agreement without senior detective