Cogito Ergo Sum - Mike's Somewhat Cryptic Crossword

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Across
  1. 3. a singer and a colour
  2. 4. number based crossword
  3. 5. who benefits??
  4. 8. make amends
  5. 9. makes good milk and better ice cream
  6. 11. an old neighbourhood
  7. 13. all daughters have towns?
  8. 14. your first grandkid
  9. 17. soothing lotion
  10. 19. note well??
  11. 20. striped, wrapped or colourbombs?
  12. 22. the ONLY dinner option for Thanksgiving
  13. 25. don't push this to cut the grass?
  14. 29. digit in binary code
  15. 30. paper with the toughest crossword
  16. 31. my error??
  17. 35. hot dog?
  18. 37. a windy wife?
  19. 38. game has tiles with smiles?
  20. 39. checks the writer's words?
  21. 40. where you usually find these?
  22. 41. guttenberg's invention
  23. 43. first day on earth
  24. 44. tasty lakefish
  25. 45. dead language
  26. 46. the Scottish play
  27. 47. not kms?
  28. 48. niagara's source
Down
  1. 1. holiday on the water
  2. 2. the lake
  3. 6. regulates blood sugar
  4. 7. Neil Young album "after the ___ ___"
  5. 10. one more than 69
  6. 12. king of the Jews
  7. 15. a far away sun
  8. 16. the voice of the people??
  9. 18. where the in-laws live
  10. 21. buyer beware??
  11. 23. paradise lost?
  12. 24. put the top down?
  13. 26. the reason people go to innisville
  14. 27. theme song of "Gold Diggers"
  15. 28. Samuel Clemens
  16. 32. bard's before?
  17. 33. not Detroit, thank god?
  18. 34. seize the day??
  19. 36. always three cartons of this in the freezer
  20. 41. bubbly water
  21. 42. a very close star