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Across
  1. 2. activity of promoting products or services (11 letters, Across).
  2. 3. join or participate in something (11 letters, Across).
  3. 4. observe or become aware of something (6 letters, Down).
  4. 6. difficulty or embarrassment (7 letters, Across).
  5. 8. away from or prevent (5 letters, Across).
Down
  1. 1. to all or worldwide (9 letters, Across).
  2. 2. set up or found (9 letters, Down).
  3. 3. study of the mind and behavior (10 letters, Across).
  4. 5. not formal (8 letters, Across).
  5. 7. a manner suitable or fitting for the occasion (13 letters, Across).