puzzle

 ACROSS

  1 There are lots of them

  5 "Weekend Edition" broadcaster

  8 Premiere

 13 What a prankster may refill with toothpaste

 14 Cheer in Cancun

 15 Capital of Albania

 16 *It makes a dog happy (Theme hint: Note three letters in each starred clue's answer)

 18 Puts into law

 19 Louisiana waterway

 20 Word before "home" or "heart"

 22 Vixen's baby

 23 *Basic democratic principle

 27 "Can I get a volunteer?"

 30 Mindless followers

 31 Like a very bright color

 32 Stretcher holders, for short

 35 Fuji, e.g.

 38 Formal refusal

 39 *Practice presentations

 41 Online gamer's woe

 42 Good smell

 44 Overblown publicity

 45 Mamba's weapon

 46 Rich cake

 48 Battle injuries

 50 *Fred Flintstone's best friend

 54 Radio journalist Shapiro

 55 Sweat spot?

 56 Place to tie the knot

 60 Get cracking, in a way

 63 *Candy bar with peanuts

 65 Turkey's capital

 66 Major fuss

 67 It's smaller than an English horn

 68 "Walk the dog" and others

 69 Org. that Edward Snowden exposed

 70 Carvey who was on "SNL"

DOWN

  1 Salad with bacon and avocado

  2 97,818 square miles, for Wyoming

  3 Bank (on)

  4 ___ Islands, South Pacific country

  5 Partner of "neither"

  6 Demoted planet

  7 Steel support for concrete

  8 Clatter

  9 Period of history

 10 "Just in case" contingency

 11 No later than

 12 Tongue's sense

 15 An adult often has 32

 17 Chinese currency

 21 Be a teacher's pet

 24 Rude remark

 25 Thumbs-up votes

 26 Weightlifter's unit

 27 Actress Kendrick

 28 Close by

 29 "Walk the dog" and others

 33 "You saved me!"

 34 Test, as one's patience

 36 ___ of opportunity

 37 Quiche ingredients

 39 Taunting challenge

 40 Rookie, slangily

 43 Labor Day's day: Abbr.

 45 Nuclear reactor insert

 47 Uber-competitive

 49 Regenerist skin care company

 50 Unskilled in

 51 NBA game venue

 52 City-related

 53 Pieces of an abacus

 57 Big instrument in a marching band

 58 Lots (of)

 59 Hera's anagrammatic mother

 61 Tree that squirrels love

 62 OB-GYNs, e.g.

 64 One may have feathers or scales

solution