The answer to “Flour source” in the LA Times Crossword

"... and other meaningless drivel," or what can be found at the start of 20-, 34-, and 44-Across 12 ltr "Bye now" 5 ltr "Dune" film score composer Zimmer 4 ltr "I'm so great!" 5 ltr "Most definitely" 4 ltr "Now __ talking!" 4 ltr "Othello" villain 4 ltr "You told me a thousand times already!" 4 ltr "You're Welcome" singer in "Moana" 4 ltr "__ been meaning to tell you ... " 3 ltr 1980s sitcom ET 3 ltr Abbr. in some airport names 4 ltr Affirmative replies 5 ltr Airport entry org. 3 ltr All Hallows' __ 3 ltr As of now 3 ltr Assessment 4 ltr Baby shower bear 5 ltr Bad news bringer 4 ltr Barrier 4 ltr Be in harmony 5 ltr Brewery tour pours, for short 4 ltr Bring in 4 ltr Broadcast's sound component 5 ltr Charles III, e.g. 7 ltr Cooperstown honoree 11 ltr Crimson Tide team, familiarly 4 ltr Didn't do well 5 ltr Doormat fiber 5 ltr Each and every one 3 ltr Elderly Shakespearean king 4 ltr Espressos with steamed milk 10 ltr Fabled race loser 4 ltr Feature of nonglossy countertops 10 ltr Fill with fear 7 ltr Fixes, as potholes 4 ltr French peak, to locals 4 ltr Friend who maintains one's watering schedule, say 11 ltr Fully gratify 4 ltr Glam gala 4 ltr Govt. intel org. 3 ltr Guys 7 ltr Hairy cryptid 4 ltr Hardware detail, for short 4 ltr Husky, as a voice 7 ltr Jacket flap 5 ltr Like a room with open windows 4 ltr Lipton drink 3 ltr Many a robocall 4 ltr Mentor's pupil 5 ltr Not top quality, screenwise 6 ltr October birthstone 4 ltr On land 6 ltr Orchard pick 5 ltr Parquet floor feature 5 ltr Polo ground chunk 5 ltr Private app convos 3 ltr Public tantrum 5 ltr Record store section 3 ltr