Related Clues:

• Bing's longtime pal
• Approval of a sort
• Subtle assent
• Saget or Newhart
• Go for apples
• Bounce up and down
• Reggae legend, to fans
• Assent wordlessly
• Head-moving assent
• Nomination, so to speak
• Say "yes" without saying it
• Bid silently
• Jerky motion
• Assent of a sort
• Exhibit drowsiness