Prefix Puzzle

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Across
  1. 3. not with
  2. 5. some
  3. 6. below
  4. 7. return
  5. 9. supernatural
  6. 11. extreme
Down
  1. 1. between
  2. 2. not right
  3. 4. apart
  4. 8. beyond
  5. 10. before
  6. 12. multiple