Related Clues:

• Layers of rock, e.g.
• Paper towel measure
• Tissue layer, e.g.
• Rock bands?
• Travel a route regularly
• Two- -- (double-layer)
• Practice diligently, as a trade
• Paper towel thickness
• Tissue box word
• Wield diligently
• Tissue part
• *Work at, as a trade
• Geological levels
• Sedimentary rock layers
• Single layer