Related Clues:

• It's made by Olympic city hopefuls
• Said, as 'adieu'
• Assent wordlessly
• Head-moving assent
• Nomination, so to speak
• Offer at Sotheby's
• Say "yes" without saying it
• Bid silently
• Assent of a sort
• Auction node
• Nod, at times
• Exhibit drowsiness
• Wordless yes
• Assent silently
• Where Cain settled