No 12575, Saturday 16 Mar 2019, Arden

Across

1. Perhaps get a verdict, it's starting from the mouth (9,5) DIGESTIVE TRACT {GET+A+VERDICT+ITS*}
10. It's included in the ten per cent to be paid (5) TITHE {T{IT}HE}
11. Add some vitamin in food, animal gets a piece of meat (9) MEDALLION {ME{D}AL}{LION}
12. Boy's turned his back on girl — off you go! (7) DISMISS {SID<=}{MISS}
13. Work's mostly free on a plant (7) OPUNTIA {OP}{UNTIe{{A}

14. City is very big, goes by another name (5) OSAKA {OS}{AKA}
16. Slim, it is no entry (3-6) OFF LIMITS Reverse anag of{SLIM+IT}
19. Can erase a wrong delivery (9) CAESAREAN {CAN+ERASE+A*}
20. Chronic headache triggered during recess... (5) NICHE (T)
22. ...in the middle doctor lives in dread (7) AMONGST {A{MO}NGST}
25. Combination of regular haulage — morning before and morning after (7) AMALGAM {AM}{hAuLaGe}{AM}
27. Angry worker assumed number one role, it's said (9) CROISSANT {CRO{I}SS}{ANT} Defn = ~role=roll
28. Hunter makes port stop working (5)  ORION {O{RIO}N}
29. Peer over opening — it's retreat of the chief legal officer (4,10) LORD CHANCELLOR {LORD}{CHANCE}{ROLL<=} ? See comments

Down

2. No will to take part in test at Edgbaston (9) INTESTATE (T)
3. I feel emission is a bit of a sticky issue (5) ELEMI (T)
4. It carries a grave message (9) TOMBSTONE (CD)
5. See nothing in such recording (5) VIDEO {VIDE}{O}
6. Earthling develops ill-nature (9) TELLURIAN {ILL+NATURE*}
7. Listed as the International law tribunal by leaders (5) ATILT (Acrostic)
8. Headgear that's assumed to be fashionable (3,4) TIN HATS {T{IN} HATS}
9. Boss is over the moon in his workplace... (6) STUDIO {STUD}{IO}
15. ...as I glance around for some medicine (9) ANALGESIC {AS+I+GLANCE*}
17. Worker's breakfast, essentially rice — it's terrific (9) FANTASTIC {F{ANT}AST}{rICe}
18. Cognition, surprisingly goes unidentified (9) INCOGNITO {COGNITION*}
19. One among churches, left some area for the clergy and choir (7) CHANCEL {CH}{AN}{CE}{L}
21. Fur — it undermines work done by animal activists to some extent (6) ERMINE (T)
23. Whiff going round and round 18 (5) ODOUR Anno not clear (Addendum - {O+ROUnD}* - See comments}
24. Crown's taken regularly on a trip abroad (5) TIARA {TrIp AbRoAd}
26. Everyone gets into Bikini, for example (5) ATOLL {A{TO}LL}

Reference List

Some vitamin=D, Boy=Sid, Work=Op, Very big=OS, Doctor=MO, Morning=AM, Worker=Ant, Number one=I, Port=Rion, Working=On
See=Vide, Nothing=O, Moon=Io, One=An, Church=Ch, Church=CE, Left=L

Colour/Font Scheme

Definition, Solution, Component letters, Embedded links, Theme word,  Anagram Indicator, C/C indicator, Reversal Indicator, Hidden word Indicator, Letter Pick indicator, Deletion Indicator, Homophone Indicator, Movement Indicator, Positional Indicator, Substitution, Indicator, Link/Connector, Extraneous

GRID