No 13787, Monday 13 Feb 2023, Vidwan

Solution to 6D 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.

ACROSS

1   Talk about final fall of humans (5) WORLD {WOR{falL}D}

4   Advocates are heroes! (9) CHAMPIONS [DD]

9   Can't use 'mental' for mental (7) NUTCASE*

10 Capital of Lanka or basically organised mob (7) COLOMBO {Ca...l}{Of}{La..a}{Or}{MOB*} First four words on Double duty?

11 An ill-tempered woman or girl makin' reels (9) GRIMALKIN*

12 Discussion about Union's local revenue jurisdiction (5) TALUK {TAL{U}K}

13 Would you push at last for an answer to a stupid question? (3) DUH Tail Acrostic

14 A right man in a champion team (9) ARGENTINA {A}{R}{GENT}{IN}{A}

17 Some red wine for Moses (5) EDWIN [T]

19 Excellent meal without slightest of pepper (5) SUPER {SUP}{peppER} Slightest to take last two letters? (Addendum - SUPpER - See comments)

21 Love not! Love not! She's mad! Opt out! Immediately! (2,3,4) ON THE SPOT {0+NoT}{SHE*}{OPT*}

23 Hellenic ornithologists returned holding a big bird (3) ROC [T<=]

24 Welcome torment with love (5) HELLO {HELL}{0}

25 Sicilia regularly follows Vatican City Prior and Pope (5,3) URBAN VIII {sIcIlIa}<=>{V} after {URBAN} Enu should be (5,4) 

28 Highs and lows? More about them! (7) EXTREMA {EXTR{'EM}A}

29 Kind of a dry day measure (7) YARDAGE {A+DRY}*{AGE}

30 One pays to see pet actor's plays (9) SPECTATOR*

31 Small point for attaching cable to computer display (5) SPORT {S}{PORT}

DOWN

1   Wife at home for example besides sweetheart? Something needed to toast! (9) WINEGLASS {W}{IN}{EG}{LASS}

2   Breaking down? Time to grin perhaps! (7) ROTTING {T+TO+GRIN}*

3   Church set aside money for crisis situation (5) DRAMA DRAchMA

4   Dismissing a bold king's record-keeper (5) CLERK {CLEaR}{K}

5   Insect carries a small cold object on the way up (9) ASCENDANT {ANT}<=>{A}{S}{C}{END}

6   'Belief in gods' is mankind basically escaping to occasionally enter kind of man-made protective cover (9) P?L?THE?E (Addendum - POLYTHENE (POLYTHEism}{eNtEr} - See comments))

7   Resistance to current legislation? (4,3) OHMS LAW [CD]

8   Start small joint (5) SHOCK {S}{HOCK}

15 Ran out to join fight set off by the most illiberal (9) NARROWEST {RAN*}{ROW}{SET*}

16 UN can toil actively for a disease preventive measure (9) INOCULANT*

18 Men turn it on for support (9) NUTRIMENT*

20 Subtle to the regularly seen range of colours (7) PALETTE {PALE}{To+ThE}

22 Friend with money? Negative! (7) PAISANO {PAISA}{NO}

24 Reportedly mends shoes (5) HEELS (~heals)

26 He pays to get particular English ruby (5) BUYER {BUY}{E}{R} (Addendum - {E+RUBY}* - See comments)

27 Boy gets title of man, returns, rules! (5) NORMS {S{MR}ON}<=

Reference List

Union = U, Right = R, Love = 0, Vatican = V, Them = EM, Small = S, Wife = W, At home = IN, Time = T, Church = CH, King = K, Cold = C, English = E, Ruby = R