Related Clues:

• Burning evidence
• Fireplace residue
• Chimney sweep's coat?
• It settles on sweeps
• Sweep's target
• Something sweeps sweep
• Sweep's take?
• Diesel fuel pollutant
• Epitome of blackness
• Flue coating
• Santa's laundry woe
• Chimney dust
• It's found in stacks
• Smudge on Santa
• Chimney buildup