Guarding the Entrance to the Prize

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Across
  1. 2. Writing fluid
  2. 4. It can be used or conserved
  3. 7. Musical instrument
  4. 8. Crossword hint
  5. 9. Lennon's song
  6. 10. Warm season
Down
  1. 1. River crossing
  2. 3. Male monarch
  3. 4. Himalayan mountaing
  4. 5. Sushi stuffing
  5. 6. It's left over
  6. 11. Right on a map