Off the Mainland by Fred Piscop

Across 1. Some tuskers 6. Mariner's "Halt!" 11. GPs et al. 14. Turn topsy-turvy 15. Track official 16. Hamelin casualty 17. Doris Day hit, off the mainland? 19. Sidewalk stand purchase 20. Place for an ace? 21. Bull pen stats 22. Soccer star Hamm 23. Flogging memento 25. Patriarch of a tribe of Israel 27. Marshall __ (Truman implementation) 30. Tick off 32. Euro forerunner 33. Part of RSVP 34. Plain to see 36. Male: Prefix 40. Parting words, off the mainland? 43. Cabinet department 44. Does a checkout chore 45. Often non-PC suffix 46. Audiophile's stack 48. Proprietary symbols: Abbr. 49. Baby-sitter's nightmare 50. Sunflower State city 54. Stable parent 56. Hydrogen's atomic number 57. Forever, seemingly 59. Digs deeply 63. "__ Mutual Friend" 64. Two shakes of a lamb's tail, off the mainland? 66. Journal conclusion? 67. "Crazy" singer Patsy 68. Bull fiddles' little brothers 69. __ Plaines, Illinois 70. Ruhr industrial hub 71. Word on a revolutionary flag

Down 1. Tampa Bay team, for short 2. Fall birthstone 3. "__ sow, so shall ..." 4. Mended, in a way 5. Mound great Carlton 6. __ snail's pace 7. Carpenter's tool 8. "... __ bagatelle" 9. Mariachi's wrap 10. "Circular files" 11. Soap opera, e.g. 12. Pie chart lines 13. Propellant for Casey Jones 18. Visit through primal therapy 24. Snake, to Medusa 26. Crosspiece 27. Trident-shaped letters 28. Pre-discount price 29. __ breve (2/2 time) 31. At attention 34. Fido's field of study? 35. Shirts and skins, e.g. 37. Batik artisan 38. Parks in 1955 news 39. Boot out 41. Work with acid 42. Like some jokes or jobs 47. "Cheers" perches 49. Bible __ (certain fundamentalist) 50. Wined and dined 51. "Ocupado" 52. Dwarf planet in the asteroid belt 53. Those against 55. Flinch, say 58. Trig ratio 60. Lemming kin 61. First name in scat 62. Rode the banister 65. Kasparov's sixteen

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