The letter from no one

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Across
  1. 3. Sticky, meltable solid.
  2. 4. Consequence for a mistake.
  3. 5. Spot for indoor fire.
  4. 7. Strange, from elsewhere.
  5. 9. Loud, harsh sound.
  6. 11. Acted nervously, fearfully.
  7. 13. Colored writing liquid.
  8. 14. Hot cooked cereal.
  9. 15. Quick, sudden move.
Down
  1. 1. Food-digesting body part.
  2. 2. Hair above upper lip.
  3. 6. Smoke pipe on roof.
  4. 8. Slow reptile, hard shell.
  5. 10. Tool for hitting nails.
  6. 12. Not smooth, has bumps.