Possible Clues:

• Dove (Scottish)
• Scooby-___ (cartoon dog)
• "Scooby-___, Where Are You!"
• 'Zip-a-Dee- -- -Dah'
• Tail of a cartoon dog?
• Whoop-de-__
• 'Scooby---'
• Dah preceder
• "Yabba dabba ___!"
• Scat-singing syllable