Related Clues:

• Much-used pencil
• One-inch pencil, say
• Gist of the matter
• Central part
• Wartlike protuberance
• Pencil remnant
• Pencil end
• Short piece of a pencil
• Small knob
• Small knot
• Small lump
• Worn-down end
• Crux of the matter
• Pencil stump, e.g.
• Worn-down pencil