Classic Rock Groups

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Across
  1. 4. Mythical river in Greek mythology
  2. 6. It's a long way to the top for rock and roll
  3. 9. Also a light motor truck (2 words, sorta)
  4. 12. They went to the point of know return
  5. 13. They won't gather any moss
  6. 14. Related by marijuana? (2 words)
  7. 17. National symbols
  8. 18. A very dark Sunday (2 words)
  9. 20. How does that thing possibly fly (2 words)
  10. 21. A very long trip
  11. 22. They're comfortably numb (2 words)
Down
  1. 1. Lots of rumors about them (2 words)
  2. 2. Like a bad bruise (2 words)
  3. 3. They has a sweet home (1 word)
  4. 5. They have no power to arrest (2 words)
  5. 7. He's wanted dead or alive (2 words)
  6. 8. He won't back down (2 words)
  7. 10. Large city in Massachusetts
  8. 11. Not good to hang out with (2 words)
  9. 15. Absolute royalty
  10. 16. He's in a haze
  11. 18. They had an appetite for destruction (2 words)
  12. 19. nothing to do with archery