Related Clues:

• Sudden loud noise (of thunder?)
• Silent assent to the dealer, e.g
• Applaud with the hands
• Auction bid, at times
• Bow put on upside down
• "Certainly!" signal
• Wordless approval
• Loud sound in a storm
• "Just ___ if you can hear me" (Pink Floyd)
• Join hands at show?
• Steve Howe instrumental that he applauded?
• Doobie Bros. "Wynken, Blynken and ___"
• Down might give one as a hello?
• Will Smith "Black Suits Comin' (___ Ya Head)"
• Donovan "Wynken, Blynken and ___"