For cruciverbalists

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Across
  1. 2. In time order
  2. 6. Really frightened
  3. 7. Bright and shimmering
  4. 9. Largest city in Scotland
  5. 10. A unit (team) of aircraft and their crew
  6. 12. Greek inventor of an innovative way of drawing up water
  7. 14. Hello in Spanish
  8. 15. German fighter plane in WW2
  9. 19. The perimeter of a circle
  10. 20. A number divisible by only itself and one
  11. 21. You use this to measure angles
  12. 22. Going up
Down
  1. 1. Point of view or shows depth in a drawing
  2. 3. The top number of a fraction
  3. 4. Someone who is first to eg. explore
  4. 5. One thousand, five hundred and sixty four in Roman numerals
  5. 6. The act of keeping going
  6. 8. ________Guinea - African country where Spanish is an official language
  7. 11. Green (of vegetation or grass)
  8. 12. Eg. well, thoughtfully, quickly
  9. 13. The state of being superior to others
  10. 16. : punctuation to start a list or to replace 'because'
  11. 17. Something which is not helpful
  12. 18. A fraction meaning one fourth