Puzzle

 ACROSS

  1 Online auction site

  5 Puerto ___

  9 Deep gorge

 14 Trifling

 15 Supply-and-demand subj.

 16 Reached a cost of

 17 *Ready to go on stage (first 4 letters + last 2)

 19 Barely defeated

 20 Filmed again

 21 Enjoys sushi, say

 23 Poetic preposition

 24 Mahershala of "Green Book"

 25 *Seashore sculptures (first 2 + last 3)

 28 Fish that cats like

 30 Lamborghini, e.g.

 31 Protest violently

 32 *Hit the gym (first 2 + last 4)

 35 Desktops with Retina displays

 37 "___ Ado About Nothing"

 38 Jacob's twin

 39 Synagogue speaker

 41 *Ballpark figure (first 3 + last 3)

 45 Actress Ward

 46 Downsides

 48 Greek war god

 49 *Celtics great Bird, to fans (first 2 + last 2)

 53 Small recipe amt.

 54 Mileage meter prefix

 55 Deborah of "The King and I"

 56 Supplements

 58 Subway fare, once

 60 April boons, and a hint to the starred answers' indicated letters

 62 Spanish for "egg"

 63 Woman's nickname hidden in "The View"

 64 Timothee's "Call Me by Your Name" role

 65 Scatter (about)

 66 Guns, as an engine

 67 New York team

DOWN

  1 Abu Dhabi or Dubai

  2 European alliance of three nations

  3 Inverse trig function

  4 Michelle of "Crazy Rich Asians"

  5 Mononymous "Parks and Recreation" actress

  6 Critical hosp. area

  7 Mature, as a CD

  8 Sans intermission

  9 Pungent salad green

 10 "I've ___ enough!"

 11 Heavenly

 12 Sound systems

 13 How humblebraggers try to be

 18 "Help, we're sinking!"

 22 Follower of Laozi

 26 Humorous Ogden

 27 Emotional injury

 29 Upper-body martial arts hold

 33 Lioness' baby

 34 Eaves dropper?

 36 "Boo'd Up" singer Ella

 38 In ___ (existing)

 39 Scientific instrument's display

 40 "Today" weatherman

 41 Etch

 42 Bargain event at a gallery

 43 DIY diagnostic aid

 44 Husbands, in Jalisco

 45 Three-toed tree huggers

 47 Discus champion Al

 50 "... get what I mean?"

 51 City districts, slangily

 52 E. Germany, to residents

 57 Judge (to be)

 59 December 24 or 31

 61 14, to Flavia

Solution