Super- Sub-

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Across
  1. 2. beyond the expected
  2. 5. an extra tax beyond the normal
  3. 6. to place something over something else
  4. 9. an amount of money over what is already being paid
  5. 10. above average in quality
Down
  1. 1. something beyond what is expected
  2. 3. beyond what is real or believable
  3. 4. a quantity more than what is needed
  4. 7. a person with the highest power
  5. 8. a person who is above someone else in rank