Related Clues:
- 15-Across' product
- Home heating option
- Whale or gear follower
- Refinery stuff
- Liquid lubricant
- A viscous lubricant
- Fluid lubricant
- Lubricating liquid
- Lubricant or petroleum
- Valuable viscous liquid
- Thick liquid that doesn't dissolve in water
- Viscous substance as lubricant
- Viscous substance for lubrication
- Would this work after tea? Well, that's where it comes from
- It would need a century to get this to come round out of the well