Puzzle

 ACROSS

  1 Military meal

  5 Mustang accelerator?

  9 Worried words

 14 Madonna's "La ___ Bonita"

 15 Zipped along

 16 "___ Rae" (Sally Field film)

 17 Subversive groups that research challenging academic subjects?

 19 Olympian on a sled

 20 Little hitters' sport

 21 Chinese flower named for a hot drink

 23 Less wobbly

 25 Fleur-de-___

 26 Led an international relief agency?

 31 WWI battle site

 35 Dallas baller

 36 Didn't have enough

 37 "This is no joke!"

 40 Time to close the books

 42 Canine's canine

 43 Backstabber

 45 Bothersome

 46 Elite Navy member who's ready for action?

 50 Spray paint container

 51 Asian shrines

 55 Stir-fry tidbit

 59 Channel changers

 61 Kind of wave

 62 Tactic to prevent weapons treaty negotiations?

 64 Dior creation

 65 Crunchy barbecue side

 66 Prefix for "freeze"

 67 Is inclined (to)

 68 Proof goof

 69 Branch headquarters?

DOWN

  1 Atomizer output

  2 "Blue Bloods" star Will

  3 Cold shower?

  4 Brazilian dance

  5 Name that Stanley yells in "A Streetcar Named Desire"

  6 Common allergen

  7 WWW address

  8 Take a nap

  9 Like parquet floors

 10 Eighty, in the Gettysburg Address

 11 As a result

 12 Iowa State site

 13 Pink, as a steak

 18 Guys who drive taxis

 22 Student, in Strasbourg

 24 Lamb's rhyming relative

 27 Part of LGBTQ

 28 Amazes

 29 ___-a-car

 30 Wee whirlpool

 31 Prepare flour

 32 "Rubaiyat" poet Khayyam

 33 Actress Suvari

 34 Stick that may "summon" a rabbit

 38 "Goodnight" girl of song

 39 Bit

 41 Self-assurance

 44 Cooking meas.

 47 Where pizza was invented

 48 Winter cap attachment

 49 Terrible time?

 52 Former finance expert Ken or Daria

 53 Make amends

 54 Factions

 55 "Now," on a medical drama

 56 River by the Great Pyramid of Giza

 57 King of Asgard

 58 Kind of D.A.

 60 Short comedy sketch

 63 Raisman in the 2016 Olympics' Final Five

Solution