puzzle

ACROSS

  1 Unexpected win

  6 This instant

  9 Tijuana's peninsula, informally

 13 Authorized substitute

 14 The "A" in UAE

 16 Bad day for Caesar

 17 Uvula's location (In this answer, note the first letter + the last 4)

 19 Beds that aren't luxurious

 20 Reason for couples therapy (... first 3 letters + last 3)

 22 Digital communication, for short?

 23 Martial arts masters

 24 Guess ___? (board game)

 27 Diplomatic delicacy

 30 What's left at the end of a meal?

 31 Sioux City's state

 33 Clog or wedge

 35 Lubricate

 39 Certain American employee (... first 3 letters + last 2)

 42 "Old MacDonald" refrain

 43 Work, like a bar

 44 Word after "baking" or before "bread"

 45 Young 'un

 47 Hurt badly

 49 Maritime distress call

 50 Cure-all

 54 Madre's brother

 56 "Death on the Nile" author (... first 4 letters + last 1)

 61 Hunter's attire, briefly

 62 Impossible to change, or like 17-, 20-, 39- and 56-Across?

 64 At least once

 65 Orange-nosed muppet

 66 Repairs

 67 Some wines

 68 Key by the space bar

 69 Wipe away


DOWN

  1 FedEx rival

  2 Event with teen royalty?

  3 Den fixture with cushions

  4 Actor in a crowd

  5 Keyboard whiz

  6 Simba's mate

  7 Taken by mouth

  8 Lightbulb units

  9 Teeth bordering canines

 10 Photoshop maker

 11 Martial artist in 2020's "Mulan"

 12 Beasts of burden

 15 Hat worn in Paris

 18 "Finally!"

 21 Gibson garnish

 24 One of six for Henry VIII

 25 Colorful Hindu festival

 26 Injury, to a 45-Across

 28 Have a conversation

 29 Spiritual emblem

 32 They stir things up

 34 Volcano known as Vulcan's chimney

 36 Neighbor of Vietnam

 37 Ctrl+Z

 38 Grps. involved with Scholastic Book Fairs

 40 Illegal liquor

 41 Add to a photo, perhaps

 46 Provoke playfully

 48 Long-distance lover's query

 50 Indiana baller

 51 Source of mescal and tequila

 52 Appointed

 53 Train along the Northeast Corridor

 55 Furry, aquatic frolicker

 57 Web page code

 58 Hilarious person

 59 Gaels' Division I college

 60 Partner of "odds"

 63 Language suffix

solution