Challenging teaser tricky tasty tester

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Across
  1. 4. the monotreme which is thought to be the origin of COVID-19
  2. 6. The proper name for a sausage dog
  3. 8. Poorly behaved rap artist, Danielle ____
  4. 11. A "dessert" of sorts eaten by one whom has just had to apologise, usually in an embarrassing situation (6,3)
  5. 12. A hot 'n' sexy dance of Cuban origin
  6. 13. Archaic term for "two", as in cleaved in ___; also think historical American writer
  7. 14. Link: wrench, bridge, headache, surface, rod
  8. 15. _____ Collins, American singer which rose to fame in the early 70's
  9. 16. A group of former students or pupils
Down
  1. 1. Part time Winnie the Pooh look-a-like, and Chinese head of state
  2. 2. Air disaster which saw 36 deaths in 1937
  3. 3. A shiny, metallic element in the periodic table, number 24
  4. 5. Nutrient rich, jelly like substance which is used to grow bacteria in labs
  5. 6. Prefix from Greek meaning twice
  6. 7. One who tries to win favour for their own advantage
  7. 9. Winner of this year's Best Supporting Actress at the Oscars (5,4)
  8. 10. Tom Hardy starred in this marvel-ous 2018 flick
  9. 11. Classic play set in Denmark about the monarchy