Clue #7

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Across
  1. 2. Physical work
  2. 4. A period of time
  3. 6. Property surrounded by water
  4. 8. Extremely large striped feline
  5. 13. Pay per hour
  6. 15. A list of names
  7. 16. Looking into the future
  8. 17. The state of being not committed
  9. 18. Asking for something
  10. 20. One who makes it through a very difficult time
  11. 21. Black bird with colorful beak
Down
  1. 1. currency
  2. 3. finely ground mineral particles
  3. 5. An arrangement things in a zigzag order; not in a straight line
  4. 7. thirst quenching
  5. 9. water rescue vehicle
  6. 10. Beyond one's scheduled working hour
  7. 11. Perspiration after a workout
  8. 12. The rate of output per unit of input
  9. 14. Calculated by dividing the sum by their number
  10. 19. Overgrown tropical forest