Related Clues:

• Pipe waste
• Bonfire remnant
• Mount St. Helens spew
• Cigar waste
• Baseball bat in the raw
• Wednesday mark
• Grill refuse
• Bonfire speck
• A grate build-up
• Close-grained wood
• It's a grate thing
• Remains in the tray
• Burnt residue
• Leaving after the barbecue
• Wednesday smudge