Assemble the answers

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Across
  1. 4. could be public or private?
  2. 6. Shabbat
  3. 8. essential pollinator
  4. 11. Octogenarian
  5. 13. honour, mark
  6. 14. golfers warning
  7. 15. sustainable building material
  8. 16. centre of a diamond?
  9. 18. informal term of grandmother
Down
  1. 1. keep it secret?
  2. 2. Eye's position amongst its peers
  3. 3. midday meal
  4. 5. glad
  5. 7. Born on 11th July 1942
  6. 9. first appearance in the world
  7. 10. informal pre name for rangers legend Willie Woodburn
  8. 12. calling of an owl with a big tongue?
  9. 17. viking settlement in northampton
  10. 19. french abbreviation requiring your action
  11. 20. belonging to any person in general