No 13078, Wednesday 28 Oct 2020, Arden

Solution to 21D 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   One is in the dock — fish right in the bottommost part of the ocean (7,6) MARIANA TRENCH {MARI{A}NA}{T{R}ENCH}

10 Livelong for a Gold brooch (5) ORPIN {OR}{PIN}

11 Past revealed, sure to know the truth (9) ASCERTAIN {pASt}{CERTAIN}

12 Free internet — invite adults, keep them amused (9) ENTERTAIN {ENTERT{A}IN*}

13 Bird lime — I’m going for ownership (5) TITLE {TIT}{LimE}

14 Spare cup’s outside, needs a wash (7) CLEANUP {C{LEAN}UP}

16 Suceptible to fall for a trick (7) CANTRIP {CAN}{TRIP}

18 In a month we go for workers’ supplement (7) AUGMENT AUG(-us+men)MENT

20 Stand and basically pick the bird (7) LECTERN {eLECt}{TERN}

22 An awful narrative — needs some nerve (5) ULNAR [T]

24 Eccentric, strange — carrying fixed amount (3,6) ODD MAN OUT {ODD}{AMOUNT*} Shouldn't the Enu should be (3,3,3)

26 Cut local tree for poles, they say (9) ELECTORAL (~polls)

27 Admission could be sans any expression (5) IDIOM aDMIssIOn* [CA]

28 Arrange help, infant has not repeated earlier success (5,2,3,3) FLASH IN THE PAN*

DOWN

2   Even curtseyed before a dignitary — one’s lost a member (7) AMPUTEE {cUrTsEyEd}<=>{A}{MP}

3   Not knowing if it’s foreign or ancestral, could be in between (9) IGNORANCE [T]

4   Many a large animal found inside (5) NYALA [T]

5   New in fashion — wearing dark blue-green is practical (9) TECHNICAL {TE{CH{N}IC}AL}

6   Rues exposing the winger (5) EGRET rEGRETs

7   Hire daily, for a limited period (7) CHARTER {CHAR}{TERm}

8   Names are strange, seem nocturnal (13) NOMENCLATURES*

9   Way to open an account (4,4,1,4) ONCE UPON A TIME [CD]

15 Vessel empty, intermittent rain plays a medley (3,6) POT POURRI {POT}{POUR}{RaIn}

17 Fruit crate broken, without a number (9) NECTARINE {N{CRATE*}INE}

19 Polite of the General to rise in support of man (7) GENTEEL {LEE<=}<=>{GENT}

21 To oppose and stop growth of writings on sex (7) E?O?I?A (Addendum - EROTICA {ER{TO<=}ICA} - See comments)

23 Tries alternate rituals (5) RITES*

25 In front, climbing on foot in the Dutch city (5) DELFT {LED<=}{FT}

 Reference List

One = A, Right = R, Gold = OR, Adults = A, New = N, Foot = FT