No 13782, Tuesday 07 Feb 2023, Arden

Solution to 16D 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

9   Carriage for drink and social upheaval (7) CHARIOT {CHA}{RIOT}

10 Poor men in this part of the world have a complaint (7) AMNESIA {A{MEN*}SIA}

11 Few will follow a leader who's foul (7) NOISOME {SOME}<=>{NO 1}

12 Drink for child during breaks (7) SCHNAPS {S{CH}NAPS}

13 Angry worker getting one in a roll (9) CROISSANT {CROSS}{ANT} over {1}

15 Said to be different - first class submarine tracker (5) ASDIC {SAID*}{Cl..s}

16 With regular dress two of them show unhappiness (7) DESPAIR {DrEsS}{PAIR}

19 Grime spreading with ease - he just shifted base (7) EMIGREE {GRIME*}{EE}

20 ... anyway, fair to include second language (5) FARSI {FAR{S}I*}

21 Established state language from the South of France (9) PROVENCAL {PROVEN}{CAL}

25 Shot a goal, it was a pain (7) OTALGIA*

26 Contact causing tense fighting (7) TACTION {T}{ACTION}

28 Take it up with every vendor initially, go in to make them happy (7) ELEVATE {EL{Ev..y}{Ve...r}ATE}

29 Look, in a way it accommodates a US base (7) OKINAWA [T]

DOWN

1   Famous study to check eyes, "see I say" (6) ICONIC {I}{CON}{I}{(~see)C}

2   Unfortunately so, can I try my luck here? (6) CASINO*

3   Pool with nothing covering on top (4) LIDO {O}<=>{LID}

4   Goddess with two articles, picks up one more (6) ATHENA {A}{THE}{AN<=}

5   Tape to be placed among group of people (8) CASSETTE {CAS{SET}TE}

6   Earth, can it be made to burn? (10) ANTHRACITE*

7   One to bad mouth a Fijian, perhaps (8) ISLANDER {1}{SLANDER}

8   Service area for butcher (8) MASSACRE {MASS}{ACRE}

14 Instrument to cover part of London with resinous substance (7,3) SEALING WAX {S{EALING}{W}AX}

16 Animal gets to run with Sully (8) D?F?O?E? (Addendum - DEFLOWER {DE{FLOW}ER} - See comments)

17 It looks colourful right on board (8) STREAMER {ST{R}EAMER}

18 Hid rotten plants in grass and did it again (8) REPEATED {RE{PEAT}ED}

22 It's a duty - once turn regularly and expose soil (6) OCTROI {OnCe+TuRn}{sOIl}

23 Able to point a gun at this predator (6) CAIMAN {C{AIM}AN}

24 Carriage between Brazil and Australia (6) LANDAU [T]

27 Beginners can have it, can get in (4) CHIC Acrostic

Reference List

Child = CH, Ease = EE, Second = S, Tense = T, With = W, Right = R