Cryptic Number 1

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Across
  1. 2. A bovine in New York state
  2. 3. Country singer performs album, including nice introductions (5)
  3. 5. More lice are found to contain what remains (5)
  4. 6. By the sound of it, I'll row (5)
  5. 8. This mutt is worshipped backwards (3)
  6. 9. Accommodation that’s barred for flappers (4-4)
  7. 11. Mistake that puts school children back (4-2)
  8. 12. The doctor followed with the first for an eye in the sky(5)
  9. 13. The one with the least hair is in a muddle when told off! (7)
Down
  1. 1. opera produced by a Scot (5)
  2. 2. The answer is sheer nonsense
  3. 4. Sounds like he massaged the dough, to meet his requirements (5)
  4. 7. Herb for a wise man (4)
  5. 9. Unrestricted state of incapacitated kangaroo (9)
  6. 10. Remote designed for an object in the sky (6)