Related Clues:

• Silvery gray
• It may be cast in a flick?
• Shade of gray
• Pinatubo product
• Silvery-gray
• Barbecue residue
• Chimney sweep's concern
• It may be gone in a flick
• Wood used for tool handles
• Type of tree
• Combustion by-product
• It may be volcanic
• Blue books?
• Dirty coat
• Chimney sweep's coating