In the Summertime...

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Across
  1. 3. Australian Open is an example of this
  2. 4. Summer tropical goodness
  3. 6. Mandatory beach uniform
  4. 7. It's all blue to me
  5. 9. Use when those pesky flies won't buzz off
  6. 11. Summer's sticky situation
  7. 12. SPF 50 is a necessity
  8. 15. A refreshing treat if it doesn't melt first
  9. 16. Shade time for the eyes
  10. 19. One way to cool off at the beach
  11. 20. Shady times on the beach
  12. 21. Days of heat with no respite
Down
  1. 1. This ingredient's place on pizza is controversial
  2. 2. Nature's fireworks
  3. 5. Take one to escape the Australian summer
  4. 8. Glorious buildings meeting their end with the tide
  5. 9. Fishing or sunbathing? This works for both
  6. 10. Where hot days are best spent
  7. 12. Sometimes on a Melbourne summer's day
  8. 13. freestyl-ing in the ocean
  9. 14. Common way of cooking at Christmas and Australia Day
  10. 17. to see life under the sea
  11. 18. Your backyard's ocean