1. * Matriarch of the Kennedy family
5. Road substance
8. * According to Greek mythology, her abduction by Paris caused the Trojan War. She was married to Menelaus and later became a Mother to daughter Hermione and (possibly) a son named Pleisthenes.
13. Songstress Fitzgerald
14. Sixties Songstress
15. City in central New York
16. Bustling commotions
17. Inventory measurement
18. * Bamm-Bamm's Mother
19. * In the Bible, she was the Mother of Esau and Jacob
21. Montréal Canadien, for short
23. Greek Goddess of Dawn
24. Potential graduates, for short
25. Word on a Towel
26. Medical building, commonly
28. Canadian singer Bachman
29. * Ricky's Mom
33. Land measure
36. Duke Ellington song: "I ___ Song Go Out of My Heart"
39. * Mama Cass had a crush on this Papa: ___ Doherty
40. Bull: prefix
41. * Planetary Mother
43. Cut back hedges
44. Heard in a Ritzy Restaurant: "Would you like your wine selection to be sweet ___?"
46. Yes! Yes! In Spain!
47. Jekyll's altar ego
48. * Last name of Gladys, the world's most famous rock 'n' roll Mother
50. Illuminated
52. 'At the age of', in Latin
53. ___-Pitch: Baseball pitch, variantly
54. Hoofed Herbivore
57. "Ice" in Germany
60. Member of Kiss
62. * Name shared by a religious Mother and a pop-star-turned-Mother
64. Roman Numerals for 704
66. * Superstar Mother to Chastity and Elijah Blue
68. Frankenstein's sidekick
69. * Mother of Fairytales
70. Saintly
71. Currency in Italy
72. Go in
73. Choose
74. * Mother Eve's third son