Related Clues:

• Sack out
• React to boredom
• Hypnotist's word
• Be sleepy
• Partner of Wynken
• Show approval, in a way
• Hibernation
• Virgil called it a gift of heaven
• Show agreement, in a way
• Go-ahead sign
• Approval
• Express agreement
• Gesture of assention
• Slumber
• Affirma-tive action?