Susan!

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Across
  1. 3. month name first appeared in Postscript issue as adviser
  2. 7. the subject of the crossword's biggest fans
  3. 10. eldest child
  4. 11. middle name
  5. 14. EICS worked with
  6. 15. Man's (well, Susan's) best friend
  7. 16. middle child
  8. 17. order from Quarry Chinese Restaurant
  9. 20. class taught to underclassmen
  10. 22. author and friend
  11. 23. horoscope
  12. 24. class taught to upperclassmen
  13. 26. home on first floor of school
  14. 27. 200_ year first named adviser
Down
  1. 1. Man's (well, Susan's) other best friend
  2. 2. home on second floor of school
  3. 4. high school mascot
  4. 5. Quarry Chinese Restaurant
  5. 6. day of birth
  6. 8. height description
  7. 9. said "I do" to
  8. 12. recently ended favorite series
  9. 13. favorite reading material
  10. 16. college mascot
  11. 18. co-adviser
  12. 19. opposite of high school name
  13. 21. youngest child
  14. 25. instrument of choice