THE TITLE

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Across
  1. 2. a person who derives advantage from something, especially a trust, will, or life insurance policy.
  2. 3. someone in between an argument making an agreement
  3. 5. concerning or enforcing discipline.
  4. 6. needed
  5. 7. according to customs or practices
Down
  1. 1. the body of words used in a particular language.
  2. 2. a barrier
  3. 4. the opponent in a competition
  4. 8. alone, by themselves
  5. 9. normal every day things