Related Clues:

• Wednesday mark
• Bonfire remnants
• 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
• Fireplace remnant
• Cigar end
• Some fallout
• It comes before Wednesday only once a year