It's in the Air

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Across
  1. 2. Mythological underwood ruler of early Ireland
  2. 4. Subject of many internet videos
  3. 6. Submerged suddenly
  4. 8. Fish for Answers
  5. 9. Criss of Glee
  6. 10. Waterway that runs north, oddly enough
Down
  1. 1. Adores to pieces
  2. 3. Rankly offensive
  3. 4. It might get checked at a theater or cafe
  4. 5. Merely symbolic, like a nice gesture
  5. 7. Where dough rises and leaves