No 12216, Wednesday 17 Jan 2018, Aspartame

Answer and annotation of 19A left for a rookie commenter till 10 AM

ACROSS
6    British revolutionary eats one, then second loaf of bread (7) BRIOCHE {BR}{1}{lOaf}{CHE}

7    Let's try to buy stuffing of unprepared pastry (7) STRUDEL {ST{cRUDe}EL*}

9    Come close to disrobed girl being shielded (5) NUDGE {NUD{G}E}
10 Dishonest editor's withdrawal requires authorisation (9) DESIGNING {ED<=}{SIGNING}
11 Grapes for a concubine (7) SULTANA [DD]
13 Fuss about king being guarded by individuals of martial art (6) AIKIDO {A}{I}{K}{I}DO}
15 Thong curled in another thong, maybe (13) UNDERCLOTHING*
19 Deceased leader of gang gets buried at first by religious person (6) O?L?T? (Addendum - OBLATE {mOB}{LATE} - See comments)
20 Small crate of ice-cream midway exported is returned, being illicit (7) BOOTLEG Anno pending (Addendum - {BOx}{GELaTO<=} - See comments)
23 Displaying jewellery with elaborate decor (9) RECORDING {R{DECOR*}ING}
24 Inert liquid is in three parts (5) TRINE*
26 Sprite affects girl and men (7) GREMLIN*
27 Information often needs to be checked for recency (7) NEWNESS {NEW{NeEdS}S}

DOWN
1    Pestles broke shell to reveal skin (4) RIND gRINDs
2    Dined on Meze with little chili, got a skin infection (6) ECZEMA {E{Ch..i}ZEM*}{A} Dined as Anagrind?
3    Solemn music that can occur in a zombie movie (4,5) DEAD MARCH [CD]
4    Ill-mannered king imprisoned being narrow-minded (8) PRIGGISH {P{R}IGGISH}
5    Notice by district inspector: Lot kidnapped one criminal more (10) ADDITIONAL {AD}{DI}{T{1}ON}{AL}
6    Dismiss bachelor with auditor's job (6) BANISH {BA}{NISH}(~niche)
7    Miso soup is somewhat average (2-2) SO-SO [T]
8    Army division executes leader for money (6) LEGION (-r+l)LEGION
12 Lines of code written to describe king of Mongolia, say (10) LANDLOCKED {L}{AND}{L}{OC{K}ED*}
14 Banishing worry being sad (9) WOEBEGONE {WOE}{BEGONE}
16 Totally, ten robbed one bank (8) ENTIRELY {TEN*}{1}{RELY} Robbed as Anagrind?
17 Engineers got time filling in for idiot (6) TOERAG {ERA} in {GOT}*
18 Leave English exam getting highest sectional scores (6) EGRESS {E}{GRE}{Se...l}{Sc...s}
21 Terracotta wagons smuggled into city (6) OTTAWA [T]
22 Family purchases large oven (4) KILN {KI{L}N}
25 Frozen dice are thawed (4) ICED*

GRID