What is it?

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Across
  1. 5. Group of girls in Grease
  2. 6. All That '.......' , song in the musical Chicago
  3. 8. Examples are Oak, Ash and Elm
  4. 9. Type of phone designed by Steve Jobs
  5. 10. City the TV series friends is set in
Down
  1. 1. The Met '.......' New York fashion event chaired by Anna Wintour
  2. 2. Friends with 7 dwarfs
  3. 3. The first two people in the bible
  4. 4. Scientist who discovered gravity
  5. 7. You must eat 5 portions of '.......' and veg a day