Puzzle

 ACROSS

 1 Ritalin target, for short

  5 Mexican money

  9 Wanders aimlessly

 14 Farewell, in Venice

 15 Cuba's Castro

 16 "It's raining cats and dogs," for one

 17 *Shared on a certain social media site (first 2 letters + last 2)

 19 "Napoleon Dynamite" candidate

 20 Come out

 21 Vegetable tray features

 23 Mickey Mouse headband part

 24 *He "went to town/A-riding on a pony" (first 2 + last 2)

 27 "That's so cute!"

 30 Hubbub

 31 Angry Birds, e.g.

 32 "Better Call Saul" star Seehorn

 34 Close by

 37 ___ Allen furniture

 41 Get-togethers that each starred answer's middle letters "interrupt"

 44 Beauty business

 45 Low in fat

 46 Music staff symbol

 47 Winter bug

 49 Uncertain factors

 51 "That's so gross!"

 52 *Symbol of U.K. rule (first 2 + last 3)

 58 Rowboat implement

 59 Cook scallops, perhaps

 60 Is dishonest with

 64 Highly capable

 66 *Fellow musicians (first 2 + last 3)

 68 Singer's scope

 69 Slurpee competitor

 70 Bronzes in the sun

 71 Fear greatly

 72 Defeated in boxing

 73 Burst ___ the scene

DOWN

  1 About a third of a baseball field

  2 Per ___ (daily)

  3 Really, really dislike

  4 Marriage custom in some cultures

  5 Fussing over oneself

  6 Dig in

  7 Soft shoe material

  8 Song such as "Yesterday"

  9 Tears the wrapping off

 10 Lofty poem

 11 Helped

 12 "Look before you leap," for one

 13 Camp treat

 18 "Great Scott!"

 22 Smooch in the street, e.g., briefly

 25 Prepare to be knighted

 26 Sight-related

 27 Parentheses' shapes

 28 Exclamation of awe

 29 Healthy

 33 In the sky

 35 Roses-red link

 36 Show again

 38 One of three in many bowling balls

 39 Once more

 40 "Too racy for the office" initials

 42 Joined the military

 43 Spread out, as a map

 48 Operate

 50 Dog-paddle or crawl

 52 Pinterest collection

 53 Storm-tracking device

 54 Singer Cara

 55 Nun's garment

 56 Give in to pressure

 57 "Nifty!"

 61 Overzealous fan, slangily

 62 Fair shelter

 63 ___ buco

 65 Org. for Mickelson and McIlroy

 67 New: Prefix

Solution