The final clue

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Across
  1. 2. purple flowers
  2. 3. the opposite of right
  3. 6. rhymes with there
  4. 8. comes before fourth
  5. 9. helps support a house
Down
  1. 1. the center
  2. 4. what seeds do when planted
  3. 5. a hole for a key
  4. 7. rhymes with wide
  5. 9. the opposite of push