puzzle

 ACROSS

  1 Thai or Chinese

  6 Future doc's exam

 10 Venomous snake

 13 Word after "ham" or "AM"

 14 Princess's topper

 15 $1,000,000, for short

 16 Riverboat serving as a restaurant?

 18 Glass of "This American Life"

 19 Make bubbly

 20 Deity who rules over Valhalla

 21 DJ's stack, once

 24 Vessel for exploring the depths of the Adriatic Sea?

 27 Straight person's prefix

 30 Comb stoppers

 31 Shade of green that's also a food

 32 Got a cannon into position

 35 Large warship with no electrical system?

 41 Muslim leaders

 42 Elicit

 43 Louvre Pyramid architect

 46 Moistened, as a turkey

 47 Passenger ship with built-in storage?

 51 Commercials

 52 Oodles of

 53 Mr. Miyagi portrayer Pat

 56 Mix in

 57 Speedy vessel that isn't exactly waterproof?

 62 Beehive State native

 63 Pitching machine inserts

 64 "Take that!"

 65 Word on all U.S. coins

 66 "Simon ___, fill in 66-Across!"

 67 Really psyched

DOWN

  1 Terrier's sound

  2 ___ Paulo

  3 Bachelor's last words

  4 Verdi opera set in Egypt

  5 Natural bridge site?

  6 Mazda two-seater

  7 Caravan beast

  8 "Trans rights ___ human rights"

  9 Road goo

 10 Surrounded by

 11 The Dog Star

 12 Backup approach

 14 Suckling spot

 17 Threesome

 20 Grammy winner Yoko

 21 Grub

 22 Where to find a hero

 23 Mix up

 25 Big furniture retailer

 26 "SCTV" actress Martin

 28 Anticipatory night

 29 Feeling after turning in a final exam

 32 Proud ___ peacock

 33 Suffix for a philosophy

 34 Hosts, informally

 36 Name hidden in "Demi Lovato"

 37 Campers, for short

 38 Letter before kappa

 39 Barely managed, with "out"

 40 Alternatives to whites, on a wine list

 43 "There was no choice"

 44 Made good as new

 45 Tissue layer

 46 ___-a-brac

 47 "The Hobbit" dragon

 48 Suggest

 49 Christmas songs

 50 Blows it

 54 Heavy instrument to march with

 55 One of three in an ozone molecule

 57 "Nova" network

 58 Tiny battery

 59 Best

 60 Private ___ (detective)

 61 Way cool

solution