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Related Clues:
- Stops a squeak
- '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