Annotations Crossword

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Across
  1. 1. Snow machine in a power cut? (7)
  2. 4. Never confused for triteness (9)
  3. 5. Let man work it out in his head (6)
  4. 7. One with a system of musical symbols (10)
  5. 8. Soprano flies out, all out of sorts (12)
  6. 12. This business sews shells, vocally (6, 4)
  7. 13. Fellow, we hear, steps with instruction (8)
  8. 14. This software did as Curiosity did? (8)
  9. 15. Animal absent vitamin is wellest? (4)
Down
  1. 2. Perrin's flat food carrier ostracises? (12)
  2. 3. He's fled if ordered home for Wednesday (9)
  3. 6. Request sustained effort (11)
  4. 9. Hopefuly not a published inticement to sin (6)
  5. 10. Reportedly the prescursor to S.H.I.E.L.D. (8)
  6. 11. Lost initially in the moor (6)