Theme: "Right on!" — Theme answers describe the word RIGHT in relation to other, related words.
- 20A: RIGHT (SYNONYM FOR JUST).
- 38A: RIGHT (HOMONYM FOR WRITE).
- 50A: RIGHT (ANTONYM FOR LEFT).
There was, however, a tad too much crosswordese for my liking. I mean, when you've got AIDA, ODIN, ADEN, and EDAM all hanging out together, that's just … too much of a good thing. Or something. Nothing else really jumped out at me. I was a big RHODA fan back in the day (26D: Valerie Harper role) and I like today's clue for KNEEL (67A: Prepare to be knighted) more than the typical marriage proposal clue. Other than that, I think HOBO is the sparkliest thing in the grid, and when you're looking at a HOBO for sparkliness, you've gotta kinda wonder.
Crosswordese 101: As we learn in today's clue, NEC is, indeed a 21D: Japanese information technology giant. According to Wikipedia, "The company used the name Nippon Electric Company, Limited before re-branding in 1983. It still goes by the full name in Japan." Clues for NEC will look like this: "IBM competitor," "Maker of many ATMs," "Japanese computer giant," and "Big name in computers."
Everything Else — 1A: Indian region known for its tea (ASSAM); 6A: Etta of old comics (KETT); 10A: Winery vessels (VATS); 14A: "The Lord of the Rings" hero (FRODO); 15A: Trendsetting (EDGY); 16A: Words after laugh or whoop (IT UP); 17A: Lisa of "The Cosby Show" (BONET); 18A: Popular depilatory (NAIR); 19A: Frozen breakfast brand (EGGO); 23A: Stephen of "The Crying Game" (REA); 24A: Charged particle (ION); 25A: Polar bear's domain (ARCTIC); 29A: Nonpaying train rider, perhaps (HOBO); 32A: Balloon-breaking sound (POP); 35A: Irritant "in your side" (THORN); 36A: Verdi's title princess (AIDA); 37A: Brett Favre's number (FOUR); 41A: Thor's father (ODIN); 42A: Mideast bigwig (EMIR); 43A: __, meenie ... (EENIE); 44A: Anatomical egg holder (SAC); 45A: Maxwell Smart's nemesis (KAOS); 46A: Make plump (FATTEN); 47A: That boat (SHE); 49A: Ending for refuse (-NIK); 58A: Comedian Roseanne (BARR); 59A: "One giant leap for mankind" site (MOON); 60A: Figure of speech (IDIOM); 62A: Colored part of the eye (IRIS); 63A: Feel concern (CARE); 64A: Chutzpah (NERVE); 65A: Use a keyboard (TYPE); 66A: Help badly? (ABET); 1D: Langley or Laughlin: Abbr. (AFB); 2D: Sellout signs (SROS); 3D: PlayStation maker (SONY); 4D: Yemen port (ADEN); 5D: Ramada, for one (MOTOR INN); 6D: Land of Obama's father (KENYA); 7D: Cheese in red wax (EDAM); 8D: "Yay, tomorrow's Saturday!" ("TGIF!"); 9D: Neophyte (TYRO); 10D: Mission __, California (VIEJO); 11D: How banks are usually robbed (AT GUNPOINT); 12D: Port pullers (TUGS); 13D: Dog in a primer (SPOT); 22D: Brazilian hot spot (RIO); 25D: One of the Musketeers (ATHOS); 27D: "FoxTrot" or "Dilbert" (COMIC STRIP); 28D: Suffix with cyclo or jumbo (TRON); 29D: Old sound systems (HI-FIS); 30D: Febreze target (ODOR); 31D: Ingot (BAR); 33D: Bellybutton type (OUTIE); 34D: Fuss over oneself (PREEN); 36D: Bullets and such (AMMO); 37D: Worry (FRET); 39D: Affirmative vote (YEA); 40D: Vulnerable spot in a chain (WEAK LINK); 45D: Barbie's guy (KEN); 46D: Christmas tree choice (FIR); 48D: Trigger, e.g. (HORSE); 49D: Three trios (NONET); 50D: More than 51-Down (A BIT); 51D: Not even 50-Down (NARY); 52D: Village People disco hit (YMCA); 53D: Ancient kingdom near the Dead Sea (MOAB); 54D: "Look out, golfers!" ("FORE!"); 55D: Snake-and-fruit story setting (EDEN); 56D: Blaze (FIRE); 57D: "Slithy" thing in "Jabberwocky" (TOVE); 61D: Filmmaker Gibson (MEL).