Puzzle

 ACROSS

  1 Field where many plays happen?

  6 Treated, as a sprain

 10 Jamaican genre

 13 One may hold socks

 14 "You" of yore

 15 Leather color

 16 *Wacky writing implements (letters 6-9)

 18 End of Wikipedia's URL

 19 Orangutans and gibbons

 20 *Happening spots in dorms (4-7)

 22 "Around the World" toy

 23 D sharp equivalent

 24 Lug

 28 "Where's the ___?"

 30 Mermaid who trades her voice for legs

 31 Vaper's device

 33 Otherwise

 37 *They reward regular shoppers (6-9)

 40 McGregor of "Trainspotting"

 41 Sheeple, e.g.

 42 Romulus' twin

 43 Articulates

 45 Attempted, with "at"

 46 Emotionally detached

 49 J.Lo's bae

 51 *Deteriorating (6-9)

 54 Unleashes (on)

 58 Juniper drink

 59 *Companion of Hermione Granger (4-7)

 61 Tattoo machine filler

 62 As well

 63 Cookie-flavored cereal

 64 Self starter?

 65 Bright color descriptor

 66 Mistakes in the starred answers? (read the "wrong" letters in order for a bonus!)

DOWN

  1 Let go of

  2 Glowing review

  3 Really impresses

  4 Voice actor Blanc

  5 Lady Gaga album with "Applause"

  6 Tech support whiz

  7 Nickname that anagrams to "tech"

  8 Start of a counting rhyme

  9 "You Gotta Be" singer

 10 Comedian's seat

 11 Cosmic fate

 12 High school feeling

 13 Crime lab sample

 17 "I did it!"

 21 Made available

 22 TALK LIKE THIS

 24 "Buy one, get one free," e.g.

 25 Cornfield pest

 26 "Yo!"

 27 Uses for support

 28 Cardinal or cormorant

 29 Applause may boost it

 31 Optometrists look at them

 32 Lifeguard's skill, briefly

 34 Dalai ___

 35 Like many a mansplainer

 36 Canadian gas brand

 38 "Love ___ neighbor"

 39 Reunion attendee, for short

 44 Kabul resident

 45 Chinese dish that customers cook

 46 Texas A&M athlete

 47 Pork cuts

 48 Sty noises

 49 Cover-up for Martha Stewart

 50 Pam's ex on "The Office"

 52 Legend

 53 Approximately

 54 Part of a process

 55 Langston Hughes poem about inequality

 56 Cook and Zuckerberg, e.g.

 57 Soon-to-be alums

 60 Suffix for "direct"

Solution