puzzle

 ACROSS

  1 "Dear old" person

  4 Keys in a chain?

  9 Cashless deal

 13 Obstacle to teamwork

 14 CNN host Chris

 15 Harsh sound

 16 Magnificent, or an antonym of the word formed by letters 1, 2, 5, 7, 8 and 9

 18 Threadbare

 19 One may dawn on you

 20 Secret, or an antonym of the word formed by letters 2, 3, 4, 5 and 6

 21 ___ scale, on which diamond is a 10

 24 Corporate computer whizzes

 27 "Winnie-the-Pooh" baby

 28 Goes with the flow

 30 Mauna ___

 31 Negative position in a debate

 32 Singer Reese

 33 Ewes' mates

 34 Engine part

 35 Lie, or an antonym of the word formed by letters 1, 2, 6 and 8

 38 Deposit, as an egg

 39 Peters who plays Quicksilver

 40 Hammer's partner

 43 Open __ night

 44 After expenses

 45 Invite on a date

 46 "___ du lieber!"

 47 Scattered all over

 49 Roadside hotels

 50 Has a big meal, or an antonym of the word formed by letters 1, 3, 4, 5 and 6

 52 Like a yellow lemon

 54 Concave belly button

 55 Hostile feeling, or an antonym of the word formed by letters 1, 4, 7, 8 and 9

 60 Music rights org.

 61 International papers?

 62 Anonymous John

 63 "So it would ___"

 64 In a fitting way

 65 Decide

DOWN

  1 Drops on blades?

  2 In days gone by

  3 Put on

  4 Decorated, as a cake

  5 "No doubt about it!"

  6 Relative of "lite"

  7 Bird that can run 31 mph

  8 Costa del ___

  9 Czech or Serb

 10 High-pressure fire hose

 11 Where students wet their palettes

 12 "___ Place" ('60s TV show)

 15 Frat dudes

 17 Show on a screen

 20 Bike effortlessly

 21 "Spy vs. Spy" magazine

 22 Glorifying poem

 23 Slim opportunity

 25 Make less angry

 26 Type type

 29 Bar bill

 33 Rafting destination

 34 Gingersnaps and others

 36 Doesn't own

 37 The "I" in TGIF

 38 Liquor-serving permit

 41 Word after "glue" or "staple"

 42 John, Paul and George: Abbr.

 43 Crime families

 45 Beast

 47 Increase, with "up"

 48 Joint that's flicked

 51 Thailand, once

 53 Small bunch of flowers

 55 Director DuVernay

 56 Puppy's bite

 57 Altar words

 58 Apex

 59 Even so

solution