puzzle

 ACROSS

  1 Body pic

  4 Admirer's poem

  7 MRI alternative

 14 Poured poorly

 16 Sea otter's snack

 17 Observing Yom Kippur

 18 Put together in a pinch (See this answer's last 3 letters + the previous answer's first 5)

 19 Near

 21 Group of games

 22 Steamed bun

 24 Ice Bucket Challenge letters

 26 Performs like Cardi B

 29 Place for a hen

 32 Raise, as a building

 34 Kindergartner's break

 35 Basketball showstopper

 37 Spaniels' sounds (... last 4 letters + the previous answer's first 4)

 39 Loan figures: Abbr.

 40 Name hidden in "loveliest"

 41 ___ pig

 44 Airship in a legendary band's name (... last 3 letters + the previous answer's first 5)

 48 Side part of a sofa

 49 Smooth and shiny

 51 Intimidating look

 52 Chew persistently

 54 Sheep's sound

 55 Nonetheless

 56 Talk endlessly

 58 Sugar from photosynthesis

 63 D or L, for this puzzle's creator

 66 Dance in the NATO phonetic alphabet (... last 3 letters + the previous answer's first 3)

 69 Film series?

 70 Subscription period, often

 71 Pushes, or is pushy

 72 Nine-digit ID

 73 Like the Sahara

DOWN

  1 Org. at LAX

  2 Bottom-row PC key

  3 Really awesome

  4 Buckeyes' home

  5 TV spots?

  6 Barely beat

  7 Persuade through flattery

  8 ___ Dhabi

  9 Covers, as a road

 10 More crafty

 11 "Relative" of Siri

 12 Nickname for a Skywalker

 13 Opposite of pos.

 15 Ego Nwodim's show, for short

 20 Baseball field cover

 22 Bikini half

 23 Internet pioneer

 25 Resell illegally

 27 5, for a long golf hole

 28 Abbr. on a Banana Boat tube

 30 Actor Astin

 31 Kinds

 32 Goddess of dawn

 33 Psychedelic experiences

 36 iO toothbrush maker

 38 Two left ___

 40 "So scary!"

 41 Prank

 42 Large vase

 43 Think up

 44 Great enthusiasm

 45 Like many fancy cakes

 46 Great anger

 47 Bottom line

 50 Birds on some quarters

 53 Late drummer Charlie

 57 Prejudice

 59 Sci-fi vehicles

 60 They'll never be pros

 61 Beasts that pull plows

 62 Total mess

 63 Little rascal

 64 It pairs with "neither"

 65 What tree rings measure

 67 Rower's need

 68 Have a go at

solution