1 Vietnamese New Year : TET
2 “A long time ___ …” : AGO
3 Sis’s sibling : BRO
4 “What are you waiting for?!” : LETSGO
5 Pertaining to a cultural group : ETHNIC
6 Princess’s headwear : TIARA
7 Person who might need a lift? : SKIER
8 Actress Washington of “Scandal” : KERRY
9 Speak aloud : SAY
10 Discontinued competitor of Coke Zero : PEPSIONE
11 Words on an Election Day sticker : IVOTED
12 Bluey or Snoopy : CANINE
13 Upright, as hair : ONEND
18 A fan (of) : FOND
21 ___ Day, occasion for planting trees : ARBOR
22 Ending with sulf- or fluor- : IDE
23 Lead-in to Man or mansion : MEGA
24 Love, in Spanish : AMOR
25 One might have farm animals, fried food and a Ferris wheel : FAIR
29 Backside : BUM
30 Sci-fi ship : UFO
31 When repeated, sound effect for Cookie Monster : NOM
33 Induct into a Hall of Fame, perhaps : ENSHRINE
34 Like the questions asked in 20 Questions : YESNO
35 Baby’s boo-boo : OWIE
36 Ever so slightly : ABIT
37 Tie, as shoes : LACE
40 “___ out!” (ump’s shout) : YER
41 Finish behind : LOSETO
42 Follows, as a hunch : ACTSON
43 Vending machine drink : SODA
44 Puts into law : ENACTS
45 Arkham ___, institution for many Batman foes : ASYLUM
46 Filled with cargo : LADEN
47 Olympic snowboarder White : SHAUN
48 Have a feeling : SENSE
49 The answers to the starred clues in this puzzle … or are they? : MYTHS
53 “Billions” airer, for short : SHO
54 Chowed down : ATE
55 Summer Olympics powerhouse : USA
56 Knight’s title : SIR