CHESTNUT

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Across
  1. 4. a mode of transport 'isn't that what you'd expect?'
  2. 6. a faithful friend
  3. 7. the first-born
  4. 8. the first meal of the day
  5. 9. to cough and pass flatus simultaneously
  6. 10. a term of endearment
  7. 11. the successor to
  8. 13. a senior's dingy
  9. 15. the 1957 champion
  10. 17. camping & studying equipment
  11. 19. family quiz game
  12. 21. he knows his mothers business
  13. 23. a two-man dinghy
  14. 24. a drinking spot
  15. 25. the successor to
Down
  1. 1. a warning to refrain
  2. 2. for those camping holidays
  3. 3. the last boat
  4. 5. when you on the go
  5. 8. a refutation, expression of rebuttal/disagreement
  6. 10. up those stairs
  7. 11. annoying 1970s ditty
  8. 12. the village where we spent Sundays
  9. 14. a power source
  10. 16. a reliable workhorse
  11. 18. successor to
  12. 20. the third-born
  13. 21. the last club
  14. 22. the last-born
  15. 23. the second-born