Related Clues:

• 'Essential' things
• Traditional paintings
• Alternative to watercolors
• Many impressionist works
• Monet order?
• Aromatherapist's substances
• Works at a museum
• Palm products
• Reduces friction
• Old masters used them
• Works at a museum?
• Some lipids
• Motor or mineral, for two
• 'The Blue Boy' and others
• Atelier inventory