Hup!

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Across
  1. 3. The main plate protector, in one sport
  2. 5. Like some voters
  3. 7. Perpendicular to a plumb line
  4. 8. The pathway to corporate power, in a manner of speaking
  5. 9. In microscopy, the viewing sample as prepared
Down
  1. 1. One of the Wright brothers, for example
  2. 2. A guarantee of financial security (two words)
  3. 4. Less commonly used in taxidermy for brightening skulls
  4. 6. Important to maintain this, for sanity's sake
  5. 8. Prepared for action, in Spanish parlance