MYSTERY 4 U

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Across
  1. 4. put 5 of this word in a row and you have a fully functional sentence
  2. 6. Princess Di's maiden name
  3. 8. opposite of down
  4. 9. one day, in the future...
  5. 10. in like a lion, out like a lamb
  6. 11. casual affirmative, widely disputed origins
Down
  1. 1. and bake
  2. 2. "the joy" but like... if it was a last name for a cute cool person
  3. 3. (homophone) winter solstice festival
  4. 5. thank god it's...
  5. 6. in 2009, the Steelers won their ____ Super Bowl
  6. 7. jesus did this on easter lol