1. Knot in a skein of yarn
5. Icelandic epic
9. Extinct birds
14. Big tippler
15. Long, long time
16. Blatant
17. Do we panic or cool it?
20. Poisonous
21. Autobiography
22. Bar bill
24. Make you up-chuck
28. "Bye now"
31. Take back, in a way
34. Face-to-face exam
35. Trick taker, often
36. 0 star rating, possibly
37. Ottoman title
38. Conventional pattern gone awry?
42. Negative ion
43. Ethereal
44. Slang for "I don't believe it"
45. Losing proposition?
46. Deep ditch
48. Collections of like objects
49. Circus performer
51. Religious no-no
53. Decree
56. Bullwinkle, e.g.
60. Bleacherites' fantasies?
64. Fort Knox measure
65. "I had no ___!"
66. Popular English drinks
67. Cognizant
68. Stitched
69. Auld lang syne