IMPOSSIBLE

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Across
  1. 2. is people have have come together
  2. 3. is someone who rides a unicycle
  3. 6. come together with other people
  4. 7. is were we live
Down
  1. 1. is like a bike
  2. 3. is were you don't know were it is
  3. 4. is a mythical creature
  4. 5. is like a suit