puzzle

 ACROSS

  1 Texter's "No more details, please!"

  4 Files for Adobe Reader

  8 Needed to repay

 12 U.S. Pacific territory

 13 Forewarn

 14 Novelist ___ Neale Hurston

 15 "Frozen" snow queen

 16 Creme de ___

 17 So-so

 18 Auto-racing fans, collectively (see letters 4 to 12 in this answer)

 21 Demolition letters

 22 "The ___ Little Puppy"

 23 Little angel

 27 Twilled fabrics

 29 "Not again!"

 30 "There ___ no words ..."

 31 Maya Angelou's third volume of poetry (9 to 12)

 35 "Frozen" princess

 37 U-turn from WSW

 38 One of five Norwegian kings

 39 It may be bitter or sweet (2 to 6)

 44 Bon ___ (cleanser brand)

 45 Little guy

 46 Dorothy of old films

 49 Abhor

 51 Certainly not cheery

 53 36-Down within "Danielle"

 54 Classic children's book that hints at this puzzle's hidden words, with "The"

 57 Grilling events, briefly

 60 Painter Matisse

 61 H's, in sorority names

 62 Actress Jessica

 63 Printer brand

 64 Carpenter's clamp

 65 Online crafts site

 66 Digits you can wiggle

 67 Realize

DOWN

  1 New Orleans school

  2 Trains, buses and planes

  3 Apple desktop

  4 Core exercise

  5 Canine problem?

  6 Sorority relative, informally

  7 Unlikely to show anger

  8 Stratospheric layer

  9 Kao pad cooker

 10 Obama ___ (when Sonia Sotomayor was appointed)

 11 One of 365 in 2021

 12 Chivalrous guys

 13 Word above this puzzle's first clue

 19 Imitated

 20 "Didn't think we'd both be here!"

 24 It's under a track

 25 Nocturnal bear?

 26 Patty meat

 28 Tiny part of an annoying cloud

 29 Longtime sitcom about a musical club

 32 Ticked (off)

 33 LLC relative

 34 One of nine in Clue

 35 Barely

 36 Miss Scarlet or Dr. Orchid

 40 When all ___ fails

 41 Increase incrementally, with "up"

 42 Software add-on

 43 Actress Reid

 47 Disquiet

 48 Dishwasher cycle

 50 Part of a college application, often

 51 Packed in like sardines

 52 Others, in Spanish

 55 Forfeited auto

 56 Races, as an engine

 57 Honey

 58 Sandwich with crisp meat, for short

 59 TD throwers, perhaps

solution