No 13855, Wednesday 03 May 2023, WrdPlougher

Solution to 13A 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.

OOF!!

ACROSS

6   Decides to retreat, abducting a gutless gendarme in front of Nazi police (7) GESTAPO {OP{A}TS<=}<=>{Ge...mE}

7   Dreamy seductress from third-world country chasing success, exempt from tax (7) SUCCUBA {CUBA}<=>{SUCcess}

9   Reveal bad pun about Indonesia (5) UNRIP {UN{RI}P*} RI/Republic of Indonesia?

10 Negotiate (initially indifferent about rent) even... (9) INTERVENE {In...t}{RENT+EVEN}*

11 ... harsher tenancy regulations on peasants, at first returning hectares upfront for nominal sum (7) HAPORTH {Ha...r}{Te...y}{Re...s}{On}{Pe...s}<=>{HA}

13 Beautiful Greek buildings (not astonishing) essentially following architect's principle (6) ?D?N?S (Addendum - ADONIS {b..lDi..s}{nOt}{astoNIShing}<=>{Ar...t} - See comments) 

15 Helping to break even oaths, promising lovers from the heart, chasing females inside - appalling to see in cricket club (4-9) COST-EFFECTIVE {oaThs}{p..mIs..g}{loVErs} after{C{OSTE{F}{F}E*}C} Will give a prize to anyone who can make this clue more convoluted than this!!

19 Floating on a plank? (6) ABOARD {A}{BOARD}

20 Wine, no doubt, starting to ferment inside, extremely easy to turn into water (7) LIQUEFY {LIQUor}{Ea{Fe...t}sY}

23 Non-regular actor, one boring dry leading man (9) PATRIARCH {P{AcToR}{I}ARCH}

24 Not at scene of crime, perhaps bailed out one missing journalist (5) ALIBI {BAILed}*{1}

26 Nobleman barely smart, lacking shame, somehow squeamish (7) MARQUIS {sMARt}{SQUeamIsh}*

27 Runs (actively, regularly) nearby school (7) NURSERY {RUNS*}{nEaRbY}

DOWN

1   Tycoon beginning to trade stocks and essentially sharing (4) TSAR {Tr..e}{St...s}{And}{shaRing}

2   One tenting temporarily in beaches mainly & missing sand (6) CAMPER {beaChes}{AMPERsand}

3   "Eat quickly! Cut-up headless fish no longer fresh!" (6,3) POLISH OFF {LOP<=}{fISH}{OFF}

4   Authorise heads of COVID committee to enter ward, rejecting outsiders, ahead of rising wave (8) ACCREDIT {wA{Co..d}{Co...e}Rd}{TIDE<=}

5   Short of time, desperately renovates U.P., displaying bright lights up high (10) SUPERNOVAE {RENOVAtES}* over {UP}

6   Try tackling a universal champion - Ronaldinho, perhaps (6) GAUCHO {G{A}{U}{CH}O}

7   Eats bananas to fill one's stomach (4) SATE*

8   Opposed state's by-election to begin with (6) AVERSE {AVER'S}{El...n}

12 Primarily not agile, pulling super hero uniform finally over cape (10) PROMONTORY {P{s..eR}{herO}{u...rM}{NOT*}{O}RY} Not sure of Anno (Addendum - {sPRY} over  {s..eR}{herO}{u...rM}{ONTO} - See comments)

14 Spooner's defeat bound to be a way of saying hello? (9) CELLPHONE (~ fell sworn to cellphone)

16 Stop time in America (8) TERMINUS {TERM}{IN}{US}

17 Bits of woven American molluscoid pearls, useful money (6) WAMPUM Acrotic Semi&lit

18 Represent precisely sharp foci of microscopy conclusively, perhaps (6) TYPIFY Tail Acrostic Semi&lit

21 Bay filled with remora, primarily twice the prey (6) QUARRY {QUA{Re...a}{Re...a}Y}

22 One's bizarre skills (4) ARTS {TSAR}* 

25 Nearly the best impression (4) IDEA IDEAl

Reference List

Hectare = HA, Journalist = ED, Time = T, Universal = U, Champion = CH, Over = ONTO