puzzle

 ACROSS

  1 *Wee fly (Hint: Imagine a letter to the right of each single-starred clue's answer. These letters spell something thematic.)

  4 Wee bit

  7 Disney movie with a genie

 14 *A8 automaker

 15 Grocery chain

 16 Tart drink

 17 *Superfan

 18 What cards are in after being shuffled

 20 *Short-term worker

 21 Italian volcano

 22 *Penne-vodka link

 23 Many pop songs use the same four

 26 Deflation sound

 30 *Strategize

 31 Something to sneeze at?

 32 Name hidden in "believer"

 33 Brazilian dance

 35 Ball pit, e.g.

 37 Roads to nowhere, and a hint to this puzzle's four thematic elements

 40 Where to bring a dirty suit

 42 Full

 45 Broadcasts

 46 Sushi condiment

 49 **Jump from a board (... a letter to the left of each double-starred clue's answer ...)

 50 Gentle shot in golf

 51 New York island

 52 **Part of, as a scheme

 53 Incite

 54 **"___ fair in love ..."

 55 Budding horticulturist's field

 62 **Be generous

 63 Trunk marker

 64 Iowa college

 65 **Smallest bills

 66 Some detect motion

 67 Terminate

 68 **Sparrow's structure

DOWN

  1 Certain fuel valves

  2 Chocolaty spread

  3 "Whataya Want From Me" singer

  4 Winter wheel wrap

  5 Novelist Christie

  6 Oikos yogurt maker

  7 ***Often (... a letter below each triple-starred clue's answer ...)

  8 ***Prom wheels

  9 ***Latin for "love"

 10 ***Laura in "Jurassic Park"

 11 ***Duchamp's art movement

 12 ***Carded

 13 ***Infamous emperor

 19 1947 Bacall/Bogart film noir

 24 Pickling herb

 25 Blubbery mammal

 26 Beach, in Bolivia

 27 Up next

 28 "Convenience" charge

 29 FDR power project

 34 Great time

 36 "Absolutely!"

 38 What you read while doomscrolling

 39 Mild expletive

 40 Trade partner?

 41 Lucy of "Charlie's Angels"

 43 Adapts

 44 Most thick

 47 Pronto

 48 Guiding light

 55 ****Mammals in caves (... a letter above each quadruple-starred clue's answer ...)

 56 ****Relative of a troll

 57 ****Tiny songbird

 58 ****Is dishonest

 59 ****:, in an analogy

 60 ****The Tar Heel State: Abbr.

 61 ****Bands' jobs

solution