"Most definitely"

"... and other meaningless drivel," or what can be found at the start of 20-, 34-, and 44-Across

"Bye now"

"Dune" film score composer Zimmer

"I'm so great!"

"Now __ talking!"

"Othello" villain

"You told me a thousand times already!"

"You're Welcome" singer in "Moana"

"__ been meaning to tell you ... "

1980s sitcom ET

Abbr. in some airport names

Affirmative replies

Airport entry org.

All Hallows' __

As of now

Assessment

Baby shower bear

Bad news bringer

Barrier

Be in harmony

Brewery tour pours, for short

Bring in

Broadcast's sound component

Charles III, e.g.

Cooperstown honoree

Crimson Tide team, familiarly

Didn't do well

Doormat fiber

Each and every one