Related Clues:

• Petroleum residue
• Alkaloid in tomatoes
• It may hold feathers in place
• It's in the pits
• Do road work?
• Coal byproduct
• Two-lane topper, often
• Chantey chanter
• Work on the road
• What a steamroller steamrolls
• Veteran mariner
• Prepare for feathering
• It can cover a lot
• Roof surface, perhaps
• Sea rover