Puzzle

 ACROSS

  1 Cooking oil brand

  7 Molecule with A, T, G and C bases

 10 Niger neighbor

 14 Gladiator fight sites

 15 Getty or Rockefeller

 17 Make a member (letters 3-6 + ...)

 18 Part of a sound system, once (... 1-4)

 19 FBI files

 21 Like a bad roof

 22 "... ___ he drove out of sight"

 23 Not needing a comb

 25 Committee head (letters 2-5 + ...)

 29 Barbershop that either cheats you or gives you what you paid for? (... 1-4)

 34 Grasp

 35 Word after "half-baked" or "concrete"

 36 Dundee denial

 37 Warning, in Oaxaca

 39 Some are flat-screen

 40 They all led to Rome

 42 Came across

 43 Achy

 45 Foot, for one

 46 Story surprise (letters 5-9 + ...)

 49 Layers (... 1-3)

 50 Its 2019 mystery flavor was Churro

 51 "___ du lieber!"

 53 "Likewise," more formally

 56 USS Enterprise, for one

 61 Small talk (letters 6-8 + ...)

 64 It's bashed at some bashes (... 1-3)

 65 Earn after deductions

 66 How villains behave

 67 Backyard building

 68 High school class, or its venue

 69 Drives back

DOWN

  1 Sun-___ raisins

  2 Florence flooder

  3 London drizzle features?

  4 Difficult responsibility

  5 More frilly

  6 Autumn bloomer

  7 A kid may connect them

  8 Actress Vardalos

  9 Matterhorn or Mont Blanc

 10 Got by

 11 Side length squared, for a square

 12 Bike security device

 13 Deep black

 16 Glass cover in a Sylvia Plath title

 20 ___ center

 23 Auction actions

 24 Certain primate

 25 Winner, informally

 26 Shack

 27 Justice Samuel

 28 Driver's license and others

 30 A proverbial cat has nine

 31 Absurd

 32 Low point

 33 Exams

 38 Bird that can run 40+ miles per hour

 39 Quintet minus two

 41 "Certainement!"

 44 Be behind

 47 Sounded, as a toy train

 48 Parlor design, briefly

 49 Flourish

 52 Morsel in a lox and bagel sandwich

 53 "Hamlet" has five

 54 Former ruler whose plural is a palindrome

 55 Water barrier

 56 Check, as the tide

 57 Sound in a salon

 58 Hearty's partner

 59 "___ never fly!"

 60 Compensates

 62 Monopolize

 63 Actress Poehler

Solution