Possible Clues:

• Rope in many an investigative force
• Neckline may bring forth a whistle
• Skate back into dock for rope
• Rope on ship's rigging
• In fat there are any three feet round the neck
• Line for extending or fastening ship's rigging
• At last there's three feet of it around your neck
• Dawdler
• Cord worn by boy scout around neck
• Neckline that may bring forth a whistle