Times 28,235: Kansas, I Don’t Think We’re 21dn Any More

Solve in real time available at https://www.twitch.tv/opheliafailure/video/1421717078, at around 12 minutes in.

Many thanks to the setter – I enjoyed this one very very much!

Definitions underlined, (ABC)* indicating anagram of ABC, {} deletions and [] other indicators.

Across
1 Vintage producer Selznick’s last about which we remain crazy (9)
WINEMAKER – {selznic}K, about which (WE REMAIN*). As in “a producer of vintages”, and nothing to do with David O. of Gone With The Wind and Rebecca fame.
6 Lively youth: fine young fellow, on reflection (5)
BUCKO – reversed, OK CUB [fine | young fellow]
9 Fellow bishop expelled by Venetians? Indeed (7)
LINDSAY – {b}LINDS, AY!
10 Knight supplies said tour (7)
CIRCUIT – homophone of SIR KIT [knight | supplies]
11 Reason stateside A&E is on the news briefly (5)
INFER – E.R. is on INF{o}
13 Spread of disease, say, after world body retreats (9)
NUTBUTTER – T.B. UTTER [disease | say], after reversed U.N. [world body]
14 Port is the ruination of one? Harsh, IMO! (9)
HIROSHIMA – (I HARSH IMO*). Being a port may not be the thing this city is best known for.
16 Odd items of fur: many are worn (4)
FRAY – F{u}R {m}A{n}Y
18 Bearing stand for broadcast (4)
MIEN – homophone of MEAN [stand for]
19 It’s not entirely sunk in: destitute and extremely cold (9)
UNKINDEST – hidden in {s}UNK IN DEST{itute}
22 Failure to reject what a sucker will fall for? (5,4)
LEMON DROP – LEMON [failure] + DROP [to reject] – if you are a sucker, and like sucking things, you might fall for, as in really dig, a lemon drop.
24 Place large letters after spinning dice (3,2)
CUT UP – reversed, PUT U.C. [as in uppercase]
25 Abscond in hot air balloon, following female (4,3)
BUNK OFF – BUNK [hot air] + O [balloon – can O really stand for anything round?] + F(ollowing) F(emale)
26 Optimism briefly at first in West Ham lifts players (7)
OBOISTS – O{ptimism} B{riefly}, plus ‘OISTS [in West Ham, or anywhere else sufficiently Cock-er-nee, lifts]
28 Replay’s beginning at ten or five to three, perhaps (5)
RATIO – R{eplay} AT 10; “five to three” is a fairly random example ratio
29 Club round the corner, by front of town clock (9)
NIGHTSPOT – NIGH [round the corner] by T{own} + SPOT [clock, as notice]
Down
1 Turning blue, swimmer becomes ravenous (7)
WOLFISH – reversed LOW + FISH
2 Joshua’s father and sister (3)
NUN – double def. Just like Baldrick’s, Joshua’s father was a Nun.
3 Suspect signs of damp and decay? (8)
MISTRUST – MIST is a sign of damp and RUST a sign of decay
4 Alight following guide and enter (3,2)
KEY IN – a guide is a KEY, and apparently, per Chambers, IN can mean “alight”. Not entirely sure how you would use that in practice? “OMG! My house is in!”
5 People descending on Number 10? (9)
RACETRACK – 10 (across) is CIRCUIT, so that’s the definition here; people are a RACE and a laid-down musical number is a TRACK.
6 Craft across the channel that Pole’s on (6)
BARQUE – QUE [across the channel, in France, “that”] that BAR is on
7 Cooked up stew or fettucine (11)
COUNTERFEIT – (OR FETTUCINE*)
8 Make better attempt perhaps to acquire a desktop accessory (3-4)
OUT-TRAY – OUT-TRY [make better attempt, perhaps] “acquiring” A
12 7 chaps in total — one in bed? (6-2-3)
FORGET-ME-NOT – FORGE [7(dn) = COUNTERFEIT] + MEN [chaps] in TOT [total]
15 Number I purchase mostly for flat in E England (9)
IBUPROFEN – I BU{y} PRO FEN. Number as in something that numbs (pain).
17 Cracker put together quickly (5,3)
KNOCK OUT – double def with KNOCKOUT, as in a dish, belle or looker
18 Outrageous IBM lark shakes establishment (4,3)
MILK BAR – (IBM LARK*). Establishment where one can buy shakes
20 Work with printing press: sort firm required (7)
TYPESET – TYPE [sort] + SET [firm]
21 Digging books up, leaving nothing out (2,4)
IN TOTO – INTO [digging] + reversed O.T.
23 Note in sort of rock something sharp (5)
PRONG – N in PROG [sort of rock (music)]
27 Fool at the first opportunity losing head (3)
SAP – {a}SAP