Vowel Progression.
  16-Across. One who locks up: LAST TO LEAVE.
23-Across. Phrase used at a remembrance service: LEST WE FORGET.
36-Across. Resort website section that includes a pool and fitness center: LIST OF AMENITIES.
48-Across. Area to reclaim misplaced stuff: LOST AND FOUND.
58-Across. Existential passion: LUST FOR LIFE. In addition to being the title of an Iggy Pop song, it is the title of a 1934 biographical novel by Irving Stone about Vincent van Gogh.
Across:
  1. Golf contemporary of Jack and Gary: ARNOLD.  Arnold Palmer (Sept. 10, 1929 ~ Sept. 25, 2016), Jack Nicklaus (b. Jan. 21, 1940) and Gary Player (b. Nov. 1, 1935).  They were born in different decades,
  however.
  7. Diner order, briefly: BLT.  As in a Bacon, Lettuce and Tomato sandwich.
  10. Hullabaloo: ADO.  Much Ado About Nothing: a
  play by Willie the Shakes.
  13. Omelet maker's tool: BEATER.
14. Slangy "Agreed": YEAH.
15. Soda container: CAN.
  18. Drive-__: outdoor movies: INS.
19. Important time: ERA.
20. Try to attract: WOO.
21. Chop finely: MINCE.
27. Lampoons: SATIRES.
  30. Legal degs.: LLBs.  As in a Bachelor of Law.  In the United States, the degree is more commonly known as a Juris
  Doctor, or JD.
31. Chimp kin: ORANG.
  32. Can. neighbor: USA.  Hi, Canadian Eh!  Apparently,
  Alaska is now a part of Canada.  
  33. Org. that issues drug recalls: FDA.  As in the Food and Drug Administration.
  41. N. or S. state: DAK.  This explains why there are
  two Dakota States.
  42. Gershwin brother: IRA.  His brother was George.
   George (né Jacob Bruskin Gershowitz; Sept. 26, 1898 ~ July 11, 1937) and
  Ira (né Israel Gershowitz; Dec. 6, 1896 ~ Aug. 17, 1983) Gershwin collaborated
  on many popular songs; George was the composer and Ira was the lyricist.  Sadly, George died young, but Ira carried on.
  43. Vermouth name: ROSSI.  It's first name is Martini.
  44. Inventor Rubik: ERNŐ.  Ernő Rubik (b. July 13, 1944) is a
  Hungarian architect.  He is best known, however, for inventing the
  Rubik's Cube.
  46. Adriatic country: CROATIA.
  52. Indian, for one: OCEAN.  Did you know that just this
  week, the National Geographic cartographers have determined that there is now
  a Southern Ocean.  The waters surrounding Antarctica have their own distinct
  characteristics.
53. Archery skill: AIM.
54. Lacking color: WAN.
  57. Had some lunch, say: ATE.
  63. "The Simpsons" neighbor Flanders: NED.
  64. Elevator name: OTIS.  Elisha Graves Otis (Aug. 3, 1811 ~
  Apr. 8, 1861) didn't actually invent the elevator, but he did invent a safety
  device that prevents the elevator fromm falling if/when the hoisting cables
  fail.
65. Places to perch: ROOSTS.
66. Pig's digs: STY.
67. Spider's trap: WEB.
68. "Who cares?": SO WHAT?
Down:
1. Proficient: ABLE.
  2. Stern, at sea: REAR.  Hi, Spitzboov!
  3. Mars rover org.: NASA.  Postcards from Mars.
  4. '20s-'40s slugger Mel: OTT.  Louisiana native Melvin
  Thomas Ott (Mar. 2, 1909 ~ Nov. 21, 1958) makes frequent guest appearances in
  the crossword puzzles.  He was killed from injuries sustained in a car
  accident when he was only 49 years old.
5. "__ It Be": Beatles: LET.
6. Nod off: DROWSE.
  7. Actress Arthur: BEA.  Bea Arthur (née Beatrice Frankel;
  May 13, 1922 ~ Apr. 25, 2009) served in the Marine Corps Women's Reserve
  during World War II.
  8. Loo: LAV.  As in Lavatory.
  9. Generic crime syndicate: THE MOB.
  10. Killing it on the test: ACING.
  11. Word after break or belly: DANCE.
12. First occurrence: ONSET.
14. "That's painful!": YEOW.
17. Homesites: LOTS.
  22. Treasury Dept. org.: IRS.  As in the Internal Revenue Service.
23. Dryer trap fuzz: LINT.
  24. Cogito-sum link: ERGO.  I think, therefore I am.
25. In addition: ELSE.
  26. Eggy Spanish dessert: FLAN.  Yummers!
  27. Word after "Going twice": SOLD.  Here is an interesting
  list of some of the most expensive pieces of art sold at auction.
  28. "Carmen" solo: ARIA.  You knew I couldn't resist
  including this aria.
29. Chore: TASK.
  32. Thurman in films: UMA.  Uma Thurman (née Uma Karuna
  Thurman; b. Apr. 29, 1970) starred in Pulp Fiction with John Travolta.
  33. One of two bumped in friendship: FIST.  The fist bump is
  also known as a Dap.  Post-Covid, this may become the new handshake.
  34. __ Arnaz, Jr., coverchild on the first TV Guide: DESI.
   Desi Arnez, Jr. (né Desiderio Alberto Arnaz IV; b. Jan. 19, 1953)
  appeared on the April 3, 1953 eddition of TV Guide, when he was less than 3 months old.
35. Europe neighbor: ASIA.
  37. Fictional rafter Huck: FINN.
  38. J.Lo's ex-partner: A-ROD.  J.Lo has a very long list of
  ex-partners.
39. Pressing need?: IRON.
40. Garden critter: TOAD.
  44. Info at SFO: ETA.  As in the Estimated Time of Arrival at the San Francisco International Airport.
  45. Needed to reorder: RAN LOW.
46. Bob or beehive: COIF.
  47. Grapevine transmissions: RUMORS.
  48. Sources of student interest?: LOANS.
49. Eightsome: OCTET.
  50. Somewhat disreputable: SEEDY.
51. Dieter's concern: FATS.
  54. Coin-in-a-fountain thought: WISH.
55. Mennen lotion: AFTA.
56. Bird's home: NEST.
59. Colorado native: UTE.
  60. Bro or sis: SIB.  Brothers and Sisters are Sibling.
  61. Milne hopper: ROO.  A reference to the Winnie-the-Pooh
  characters.
62. __-impact aerobics: LOW.
Here's the Grid:














 
