Related Clues:

• "Just ___ if you can hear me" (Pink Floyd)
• Doobie Bros. "Wynken, Blynken and ___"
• Down might give one as a hello?
• Will Smith "Black Suits Comin' (___ Ya Head)"
• Donovan "Wynken, Blynken and ___"
• Natalie Merchant "The Land of ___"
• Nonverbal greeting
• Wordless opinion
• Paul McCartney "___ Your Head"
• Pal of Winken and
• Silent affirmative
• Unstated assent
• Anagram of the letters O-N-D
• Nonverbal okay
• Signal ''OK'' silently