Related Clues:

• Mary Kay's last name
• Vulcanology subject
• Grate-ful?
• A certain tray may hold it
• Urn contents
• They soiled Cinderella
• Bit of air pollution
• It comes from your butt?
• Hard lumber
• Burning remnant
• Tree before or after a fire
• Fire signs
• Burnt log leftover
• Ember, in the end
• Powdery residue