1. Mingle → HOBNOB
2. Lizard with an oceangoing subspecies nicknamed Godzilla → IGUANA
3. "Wait!" → NOTYET
4. Once-common pesticide banned in 1972 → DDT
5. Color of a literary "A" → SCARLET
6. Tax on imports → TARIFF
7. Gets ready to fire → AIMS
8. Nest egg inits. → IRA
9. Disorderly heap of people → DOGPILE
10. "There's a traitor in our ___!" → MIDST
11. Veteran → OLDTIMER
12. Advisory in a school zone → SLO
13. ID with two hyphens → SSN
19. Abbr. before a year → ESTD
21. One might precede "Excuse you!" → BELCH
24. Ballpark figures → STATS
25. Homeowner's proof of purchase → DEED
26. Right direction? → EAST
27. Meeting, slangily → SESH
29. Worrier's opening words → IFEAR
33. ___ Dame → NOTRE
34. See 58-Across → EATS
35. Potatoes, in Indian cuisine → ALOO
36. Runs amok → RAMPAGES
37. Juan : Spanish :: ___ : Portuguese → JOAO
38. Below, poetically → NEATH
40. Drinking sprees → BENDERS
41. One way to get to an airport → SHUTTLE
43. Modest poker holding → PAIR
44. Big name in upscale fashion → LAUREN
45. Unfair accusation → BUMRAP
46. Jenna of "Beetlejuice Beetlejuice" → ORTEGA
47. Answered an invitation → RSVPED
49. People looking for hookups, informally → RVERS
52. Car at an auction, maybe → REPO
54. Part of a Bahama Mama → RUM
55. Belt in judo → OBI
56. "You ___!" (words of agreement) → BET
57. Letter after chi → PSI