Related Clues:

• Grit
• Rock group?
• Rough voice, metaphorically
• Roof, in a way
• Material for some driveways
• Roofing material
• Driveway surface
• Road cover
• Driveway material
• Little rock?
• Type of driveway
• Driveway cover, perhaps
• Driveway covering
• Doctor's signboard
• It's on the house