Related Clues:

• Beehive oven input
• Lousy stocking filler
• Snowman's eye material
• Type of energy
• Old furnace fuel
• Frosty's eye
• Anthracite, e.g.
• Fuel that's shoveled
• Type of fuel
• Lignite or anthracite
• Snowman's eyes
• It's found in seams
• Furnace fodder, perhaps
• Furnace fuel, sometimes
• Lignite, for one