A1. Musical starter ~ ACTI

A5. Social gatherings for men only ~ STAGS

A10. ___ Beta Kappa ~ PHI

A13. Go hither and yon ~ ROAM

A14. Pulitzer-winning composer George ~ PERLE

A15. Smuggled ~ RAN

A16. He was born on 56-Across ~ ABRAHAMLINCOLN

A19. Put into a heap to decay ~ COMPOSTED

A20. Wearable souvenir ~ TEE

A23. Ashram words ~ OMS

A24. Sloth, for example ~ SIN

A25. Burger bash ~ BBQ

A28. "North to the future" is its motto ~ ALASKA

A30. HOV lane sights ~ VANS

A31. "Nice cape work!" ~ OLE

A32. Good score for a hand of hearts ~ ZERO

A33. Hacker's words of success ~ IMIN

A35. Had the title to ~ OWNED

A37. He was born on 56-Across ~ CHARLESDARWIN

A40. ___ decisis (legal principle) ~ STARE

A41. In a sec ~ SOON

A42. Sith fighters ~ JEDI

A44. Blow it ~ ERR

A45. Wielder of the hammer Mjolnir ~ THOR

A47. Introduces to the mix ~ ADDSIN

A49. Have a cow? ~ EAT

A50. Starchy item at a fall feast ~ YAM

A51. Rice-Eccles Stadium football player ~ UTE

A52. Big bang producer ~ TNT

A53. Satisfactory ~ UPTOSNUFF

A56. See 16- and 37-Across ~ 12FEBRUARY1809

A61. Yucatán year ~ ANO

A62. Glass work ~ OPERA

A63. M ~ 1000

A64. Hosp. workers ~ MDS

A65. Web programming language ~ XHTML

A66. Pioneering Boeing planes ~ 707S

D1. Bear rival ~ ARA

D2. Male swan ~ COB

D3. Gob ~ TAR

D4. Apple variety ~ IMAC

D5. Cyberjunk ~ SPAMMAIL

D6. Fill-ins ~ TEMPS

D7. 1968 folk album recorded live at the Bitter End ~ ARLO

D8. Signature sound from a trombone ~ GLISSANDO

D9. Remitted ~ SENTIN

D10. Cattle driver's tool ~ PROD

D11. Yankees owner Steinbrenner ~ HAL

D12. Auberge ~ INN

D17. Velcro bit ~ HOOK

D18. Bowdlerize ~ CENSOR

D20. Character who debuted in the cartoon "Devil May Hare" ~ TAZ

D21. Dog in the comic strip "Cathy" ~ ELECTRA

D22. Aviation editor of Cosmopolitan in the 1920s ~ EARHART

D25. Most difficult to fillet ~ BONIEST

D26. Don't stick out ~ BLENDIN

D27. Math class abbr. ~ QED

D29. Get high ~ SOAR

D30. Sun block ~ VISOR

D34. Person with a muscular body ~ MESOMORPH

D36. Letters in a magnetic fish ~ WWJD

D38. Input again ~ RETYPE

D39. Orchestral tuning note ~ ANATURAL

D40. Get a load of ~ SEE

D43. Prin. counterpart ~ INT

D46. Boater's place ~ HATBOX

D48. Disobey ~ DEFY

D51. Render weaponless ~ UNARM

D53. Subject of a museum in Roswell, New Mexico ~ UFOS

D54. Ingredient in haggis ~ SUET

D55. Air Force stealth jet ~ F117

D56. When "SNL" ends ~ 1AM

D57. Jr. alternative ~ 2ND

D58. Part of many toll-free numbers ~ 800

D59. Bond ~ 007

D60. When Clinton was prez ~ 90S