Puzzle

 ACROSS

  1 Person from Florence, e.g.

  7 Bird that glides when swimming

 11 Bring into play

 14 1-Across' country, to a 1-Across

 15 One may be unsung

 16 Veto

 17 Cannonball launcher?

 19 It's hidden backward in "strands"

 20 Put into office

 21 Like many old coins

 22 Ball-balancing aquarium resident

 23 Piece of classroom furniture

 24 Trinity member

 26 Office number: Abbr.

 28 Fuss

 29 Thumbs-down vote

 32 Jamaican who follows Jah

 36 A new ___ on life

 39 Windows, for example

 42 Sticky pine substance

 43 Welcome mat's place

 44 Fez or kepi

 45 15th-century Peruvian

 47 L.A.'s land

 49 "Peter Pan" fairy

 54 Harvest

 58 Likelihood

 59 What Popsicles do on hot days

 60 Ghana's capital

 61 Boot's end

 62 Common time for a student club, or a hint to the ends of 17-, 24-, 39- and 49-Across

 64 Brewpub order

 65 Chinese currency

 66 End of an intimidating warning

 67 '60s hallucinogen

 68 "Frozen 2" snow queen

 69 Baseball's World ___

DOWN

  1 Helped through adversity, with "over"

  2 Scrabble draw that can go in front of NEATEN

  3 Clips coupons, say

  4 Digital advertiser's measures

  5 "You ___ seen nothing yet!"

  6 Remind again and again

  7 Submerged ridge

  8 Run-down

  9 Take into custody

 10 Silent acknowledgment

 11 Bound to tell the truth

 12 Moses' mount

 13 Glorify

 18 Non-palindromic sib

 22 Corn bread and coleslaw, often

 24 Warmth

 25 Coral producers

 27 Hypnotic stupor

 29 Neither rhyme ___ reason

 30 Gibbon or gorilla

 31 "I couldn't agree more!"

 33 Palindromic sib

 34 Explosive sticks

 35 A long time ___

 37 Oceanographer's study

 38 CPR expert

 40 Skating sites

 41 Motown genre

 46 Holding capacity?

 48 Pro with a bow

 49 Damage beyond repair

 50 Teen heartthrobs

 51 Prerelease versions

 52 Justice Kagan

 53 Copier tray abbr.

 55 Reason for a food recall

 56 Popped up

 57 Turns white

 60 Unit of forestland

 62 Thumbs-up vote

 63 Emergency signal

Solution