Related Clues:
- Tobacco product
- Roadwork material
- Gravel alternative
- La Brea ___ Pits
- Oozy road material
- ___ Heels (college team)
- Smoker's residue
- One unhealthy part of cigarettes
- Goo in a prehistoric pit
- Seafarer, informally
- Paving substance
- Sticky substance used in road construction
- Car washer's challenge
- Source of some fossils
- Roadwork gunk