Related Clues:

• Dressing ingredient
• Tin Man's need
• Lubricant
• Shale extract
• Rembrandt medium
• Source of igneous rock
• Pompeii coverer
• Vesuvius output
• Squeak stopper
• Gusher output
• Pumice provider
• Olive, for one
• Vesuvian flow
• It's often crude
• Krakatoa output