Related Clues:

• Gesture with which mood becomes low?
• Silent show of approval
• Gesture of acknowledgment
• Signal to go ahead
• Doze, with "off"
• Up-and-down agreement
• Retiring lecturer gives assent
• Show approval: no deal initially
• Silent consent
• Wooden shoe sailor
• Signal of assent
• Be about to drop off teacher going north
• Say yes quietly
• Incline the head
• Turning, lecturer is to indicate agreement