Solution to 3D has been deliberately left unsolved and is to be answered only by a non-regular / novice commenter, with proper annotation. Those who have answered earlier in the week, please give others a chance.
Open for anyone to answer, if not solved by 1 PM.
ACROSS
8 Good and right judgement about a royal associate in ambit of ambiguity (4,4) GREY AREA {G}{R}{EY{A}{R}E}{A}
9 Deadlines set essentially for sleep! (6) DROWSE {D}{ROWS}{sEt}
10 Rest of singing group could be orchestral (6) CHORAL {CHORAL+SET}*=ORCHESTRAL [CA]
11 Crown consumed a restricted drug with uncontrolled rage (8) HEADGEAR {H{E}AD}{RAGE*}
12 At home, heartless Spooner revels in the flesh (2-6) IN-PERSON {IN}{SPOoNER}*
13 Eskimo has time to sense! (6) INTUIT {IN{T}UIT}
14 Adams must intuit going with due adjustments being made (7,8) MUTATIS MUTANDIS*
18 Life for English! It's oddly about public relations! (6) ESPRIT {E}{S{PR}IT*}
20 Trick associated with common guilt (8) CONTRITE {CON}{TRITE}
23 One escaping from prison, most open to fly endlessly for a spicy curry (8) JALFREZI {JAiL}{FREe}{ZIp}
DOWN
1 At heart, poor Phantom's an abandoned child! (6) ORPHAN [T]
2 Oddly many bowed, without hint of courtesy before a gift by Patanjali (8) AYURVEDA {mAnY}{cURVED}{A}
3 He cures diseases and practices (6) ?R?L?S (Addendum - DRILLS {DR}{ILLS} - See comments)
4 Saw changes in him around laundromat units (7,8) WASHING MACHINES*
5 Visionary one on US Narcs file (8) IDEALIST {1}{DEA}{LIST}
6 Knight battled, sacrificed head for love (6) NOUGHT {N}{fOUGHT}
7 It is a new transformed state (8) ESWATINI*
16 Thin disreputable women are back as God intended (2,3,3) IN THE RAW {THIN*}{W+ARE<=}
17 Half of this is in Scandinavian fringe of Atlantic (5,3) NORTH SEA [GK] (Addendum - {NOR{THis}SE}{At...c} &lit - See comments)
19 Burden if error carries backward process (6) REFINE [T<=]
21 Devotee with jewel from the east and a spice (6) NUTMEG {NUT}{GEM<=}
Reference List
Good = G, Right = R, Royal = R, Associate = A, Dead = D, Drug = E, Time = T, English = E, Vote = X, Knight = N, Women = W
