Related Clues:

• Signal 'OK'
• Indication of approval
• Eden neighbor
• Partner of Winken and Blinken
• Greet silently
• Body language?
• Indicate agreement
• Bow the head
• Auction motion
• Winken and Blinken companion
• Bob the head
• Get sleepy
• Signal, perhaps
• Wordless agreement
• Move like a bobblehead doll