Superhero Ten!

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Across
  1. 2. Groups containing two things
  2. 3. A word that rhymes with seven
  3. 5. The total made by every number pair
  4. 9. The home of bees and a word that rhymes with five
  5. 10. The number that bonds with six
  6. 11. A hidden place where the hero begins
Down
  1. 1. A long climbing plant
  2. 4. Take two from ten and this is what's left
  3. 6. I have one ball - how many more to make ten?
  4. 7. How to get to heaven
  5. 8. This plus seven makes ten!