Peanuts!

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Across
  1. 1. imaginary fighter plane
  2. 4. Lucy's family name
  3. 6. Charlie Brown's lament
  4. 7. Linus' security
  5. 10. Snoopy's sib
  6. 12. Snoopy's animal avatar
  7. 13. Charlie Brown cooled down
  8. 16. Peppermint Patty's character
  9. 17. brother to Linus and Lucy
Down
  1. 2. Lucy's crush
  2. 3. Spike's digs
  3. 5. Schroeder's musical crush
  4. 8. Charlie Brown's BFF
  5. 9. Charlie Brown's baseball job
  6. 11. Patty's flavor
  7. 14. Snoopy's imaginary night
  8. 15. Charlie Brown's Halloween take