No 13670, Monday 26 Sep 2022, Hypatia

Solution to 11D 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   Painter's drawing in hospital with a flower (6) DAHLIA {DA{H}LI}{A}

4   Setter's bored by the German boxer's doctrine (8) IDEALISM {I{DE}{ALI'S}M}

9   Destroy one virus caught spreading ultimately deadly disease (6) SCURVY {ViRUS+C}*{d...lY}

10 Letters from cycling buddy encourage husband to move ahead (8) ALPHABET {(-p)AL(+p)P} and {ABET}<=>{H}

12 Spooner's hair colour for formal wear (5-3) DRESS-TIE (~ tress dye to dress tie)

13 You and I can get working (6) USABLE {US}{ABLE}

15 Two women with shields fighting in rodeo (4,4,4) WILD WEST SHOW {TWO+W+W+SHIELDS}*

18 How a model performs or protests? (7,1,4) STRIKES A POSE [DD]

21 Assumes largely reliable president's boring America (6) USURPS {U{SURe}{P}S}

22 Cook tosses English eggs in free dessert, say (4,4) RICH FOOD {CHeF}{00} in {RID}

24 Scrap's worth (5,3) THROW OUT {WORTH}* [RA]

25 Bored Anu runs wild in sex (2,1,3) IN A RUT {ANU+R}* in {IT}

26 Married lives need time to weather tear and abuse (8) MISTREAT {M}{IS}{TEAR*}{T}

27 Old country's part of upper Sialkot (6) PERSIA [T]

DOWN

1   Eat quickly and throw on the ground (4,4)  DASH DOWN [DD]

2   Bug in fuse tripping perfect boxes (8) HOUSEFLY {HO{FUSE*}LY}

3   Give authority to stop and interview West Haryana's leading criminal (6,4,5) INVEST WITH POWER {STOP+INTERVIEW+W+Ha...a}*

5   Decorative object looking lovely basically! (4) DOLL Acrostic #lit

6   Slim odds of a new stagecoach wandering without horse at the lead (1,5,2,1,6) A GHOST OF A CHANCE {OF+A+N+STAGECOACH}* over {Ho..e}

7   Swallow that is biting many birds in bushes initially (6) IMBIBE {I{Many}{Bi..s}{In}{Bu...s}E}

8   Parent taking time to make home run (6) MOTHER {MO{T}HE*}{R}

11 Connection finally back on board (7) ?I?S?I? (Addendum - KINSHIP {bacK}{IN SHIP} - See comments) 

14 Comic hero tries bananas in  American's sack (7) ASTERIX {TRIES}* in {AX}

16 Hence, reporters skip over stops (8) SOJOURNS {SO}{JOURNoS}

17 Some chatted never bringing up bad blood (8) VENDETTA [T<=]

19 Copper gets most used for 23, perhaps (6) CUSTOM {CU}{MOST*}

20 Durga attacking with Shakti, primarily protects (6) GUARDS {DURGA*}{Sh...i}

23 Starts to pray using japa and ritual for Navartri (4) PUJA Acrostic

Reference List

Hospital = H, The in German = DE, Caught = C, Women = W, With = W, President = P, English = E, Runs =R, Sex = IT, Married = M, Time = T, West = W, New = N, American sack = AX, Over = O