puzzle

 ACROSS

  1 Moves, like a tail

  5 Includes on an email

  8 What a balloon or showoff is full of

 14 Spilled salt, to some

 15 Break ground?

 16 Brother of Artemis

 17 "Hilarious!," in a text

 18 Hockey great Bobby

 19 Hawaiian verandas

 20 Somersault's kin (Theme hint: Think "spring")

 23 Memorial Day's month

 24 Angle measure equal to about 57 degrees

 25 Ground cover?

 26 Trait transmitters

 29 The Wasp's partner

 32 Eve's partner

 33 Some tennis routs (... "summer")

 37 Disregard

 40 Portray

 41 Omits (... "fall")

 45 Workplace safety org.

 46 Bank patron's ID

 47 Bed/sofa hybrid

 48 "2001: A Space Odyssey" computer

 50 Like "Death of a Salesman," lengthwise

 52 Evil ... or so good

 53 Smart casual jackets (... "winter")

 58 "Same here!"

 60 ___ for the moon

 61 Sheet that won't keep you warm?

 62 Rich Uncle Pennybags wears one

 63 Dessert within "whoopie"

 64 Ain't, alternatively

 65 Goes in

 66 Use a needle and thread

 67 "Little piggies"

DOWN

  1 Wild animal in the dog family

  2 Peas or Nerf darts

  3 Stick shift selection

  4 Job for a plow

  5 C-E-G, e.g., in music

  6 Warm, or something that makes you warm inside

  7 Red hot chili pepper, maybe

  8 It frequently connects rooms

  9 Gem such as the Olympic Australis

 10 Truck weight unit

 11 Car rental company

 12 Homer epic

 13 Like pink cheeks

 21 Flashlight batteries, perhaps

 22 As Seen ___

 25 "Stop that right now!"

 26 Oprah's middle name

 27 Feature of a cube but not a sphere

 28 "Grammy"

 30 Dr.'s study

 31 What wines do over time

 34 Spray that keeps produce fresh

 35 Alexa's home?

 36 Obsessive fan

 38 DVR button for taping a show

 39 Key you may push frantically

 42 Apt-sounding name for a driver?

 43 Opens, as a present

 44 ___ Roll (chewy candy)

 47 ISP regulator

 48 Wore

 49 Embrace as one's own

 51 Crooked

 52 Orthodontist's concern

 53 Rise rapidly

 54 Partners of pans

 55 "I'm not done yet ..."

 56 ___ down (soften)

 57 Drops below the horizon

 59 Most common English word

solution