14 crossword puzzle clues you can only solve if you're really smart

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Across
  1. 3. Kicks under? (10 letters)
  2. 7. One charging a flat rate? (8 letters)
  3. 9. They come in last (3 letters)
  4. 11. Colds that last a long time (7 letters)
  5. 12. Brother powder? (5 letters)
  6. 13. Strips in geography class (6 letters)
Down
  1. 1. Pictures of Yosemite? (4 letters)
  2. 2. Prepare to get juice from (6 letters)
  3. 4. Lads who spend a lot of time looking at the net? (8 letters)
  4. 5. Whirlybird (9 letters)
  5. 6. Rubber from the Middle East (7 letters)
  6. 8. Quick board meeting? (10 letters)
  7. 10. Nurse, e.g. (5 letters)
  8. 13. "Just throwing out there," briefly (3 letters)