Related Clues:

• Refined petroleum
• Olive or sunflower extract
• Choice for a portrait
• Sub sandwich dressing item
• 'Essential' substance
• Watteau work
• "Lorenzo's ___" (1992 film)
• Masseuse's bottleful
• Paint like a toddler
• Target of refinement
• Van Gogh medium
• Tanker's tankful
• Squeak silencer
• Canola __
• A lubricant