An Enigma of Words

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Across
  1. 2. to be enlightened with deep thought
  2. 4. the fear of being underground
  3. 6. genre of rock music
  4. 7. name of the lead singer in Nirvana
Down
  1. 1. below the surface
  2. 3. the art of rhythmical composition
  3. 5. latin for enlightenment