1) After Scooby or Scrappy 2) Beginning of a hickey 3) Bit of Sinatra improvisation 4) Dah preceder 5) Diaper rash cause 6) Driver only operation 7) Durante title word 8) End of a Bedrock catchphrase 9) End of a flintstone yell 10) End of a rural wake-up call 11) End of a wake-up call 12) Ending for Scooby or Scrappy Found on https://www.crosswordclues.com/clue/doo