ACROSS

  1 Casual pace

  5 "That's my intention"

 12 Surrealist painter Magritte

 13 Jokes seriously

 15 Play parts, or plays a part

 16 With respect to

 18 Often-unhelpful customer support option

 20 Tennis great Monica

 22 Six-time NBA MVP ___ Abdul-Jabbar

 23 Softball stat

 26 Easy ___, easy go

 27 Apt rhyme for "glide"

 28 Bruno Mars song whose title is sung before "like one, two, three"

 30 Auction grouping

 31 No. 1 thing at a sports game?

 32 50% the usual pace

 34 Inquired about

 37 Overly

 40 Heated and styled

 41 Appealing quality

 43 Bonet of "Angel Heart"

 44 "I'm at my wits' ___!"

 45 Appliance that may be slow

 46 Miniature image on Twitch

 48 Split the bill

 49 Emphatic, elided adjective

 53 Dreary

 54 Form a labor union

 55 Deer group

 56 Sooner or later (but probably later)

 57 Beret holder, in French

DOWN

  1 They're left in the snow

  2 Place to play pool, perhaps

  3 Most populous Canadian province

  4 Dipped a toe in, metaphorically or literally

  5 "The cat's pajamas," e.g.

  6 ___-up energy

  7 Back muscle, for short

  8 Summer drink suffix

  9 "Tiny Desk Concerts" station

 10 Scots' caps

 11 "After further consideration ..."

 14 "Until we meet again!"

 17 Lesbian who may or may not be attracted to butches

 19 Geography contest

 21 Visionary

 23 Insulted devastatingly

 24 Collided with

 25 Put two and two together

 28 Vampire's resting place

 29 Score such as 20-20

 31 Motorist's distress signal

 33 Put two and two together?

 34 Skilled enough

 35 Goo in some oddly satisfying videos

 36 State north of North Macedonia

 38 Where a squirrel might find food

 39 It's loaded near a lode

 41 Fish hidden backward in "haddock"

 42 Dr. Jekyll's alter ego

 45 ___ Island (New York's "Playground of the World")

 47 Thus

 48 Great Sphinx's home

 50 On the ___ (in flight)

 51 Hour after noon

 52 Snapchat clip, briefly