Related Clues:

• 'Yes' signals
• Signals silently
• Auction assents
• Some survey responses
• Answers from a toady
• Indicates yes
• Nods, often
• Toady's answers
• Opposite of 46-Across
• Drifts (off)
• Dozes (off)
• Moves a head?
• Misses some of the lecture, perhaps
• Sycophantic replies
• Gives a heady response?