1. Russian emperors
5. Concepts
10. Persian ruler
14. A genus of amphibians
15. Of the simplest Greek architectures
16. Curd of mashed soya beans
17. Cookware
19. Grooves
20. Card with just one symbol
21. Focussing glass
22. Hangman's knots
24. Extremely
25. Food processing factory
26. Study of the responsibilities of citizenship
29. Go back further
30. Haul up
31. Invigorating medicine
32. Amount charged
35. Sicilian volcano
36. Relinquish
37. Matured
38. Lump or bundle
39. Heart artery
40. Greek units of weight
41. Intentionally disregard
43. In the middle of
44. Modes of pronunciation
46. Small fly
47. Wickerwork
48. A son of Adam (Bible)
49. Mountain in Crete
52. Goddess of discord (Greek mythology)
53. Unclenched
56. Exploded star
57. Not here
58. Mid-western state
59. Assist
60. A large northern duck
61. Celtic deity
2. Synchronized (abbrev.)
3. Winged
4. Male sheep
5. Lazy people
6. Soft and fluffy
7. Historical periods
8. What we breathe
9. Outline of a plot
10. Powerful
11. Church (3 words)
12. Not before
13. Vixen
23. Anagram of "Cone"
24. Passport
25. Dance done in a line
26. Masticate
27. A very small amount
28. Vengeful
29. Loudly (musical term)
31. Units of pressure
33. Snake-like fishes
34. Assemble or modify written material
36. Explanatory note
37. Somewhat (2 words)
40. City in Nebraska
42. Anagram of "Set tag"
43. Part of a stamen
44. Sporting venue
45. Chocolate substitute
46. Style of art or writing
48. The beginnings of a plant
49. Image of a deity
50. Moist
51. Hebrew month
54. A Greek letter
55. Zero