Katie M's Crossword: double the last letter when adding -ed

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Across
  1. 2. Slid
  2. 4. Halted
  3. 7. Tapped
  4. 8. I ......... the guitar strings.
  5. 10. Snatched
  6. 13. Hurt with a knife.
Down
  1. 1. Cut
  2. 3. Saw
  3. 5. Organised
  4. 6. Happened
  5. 9. Stuck
  6. 11. Stood in for.
  7. 12. Planted in a pot.