Related Clues:

• Say yes silently
• "Wynken, Blynken and ___"
• Pal of Winken and Blinken
• Silent 'yes'
• Silently assent
• Go to sleep, with 'off'
• A way to do one's bidding
• Bob of hope, maybe
• It's a privilege to account for drink to retiring editor
• Doze momentarily (with "off")
• Fall asleep (with "off")
• Agree wordlessly
• Signal of approval
• Drowse
• Bobbleheads do it