Sub Super Sur

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Across
  1. 1. an electric underground railway
  2. 3. a person who is under someones rank
  3. 4. below the freezing point
  4. 5. power above everyone else
  5. 6. to put under water
  6. 7. to water something from under the ground
  7. 8. place something over something else
  8. 10. a watercraft that stays under the water
  9. 11. splendid
  10. 14. a manager in charge of someone else
  11. 16. excellent
Down
  1. 1. over and above what is already being paid
  2. 2. extra
  3. 3. not fully aware
  4. 5. under the skin
  5. 7. bizarre
  6. 9. beyond what is expected
  7. 12. beyond the normal tax
  8. 13. under control
  9. 15. to put under someone else's control