Solution to 25A 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.
Open for anyone to answer, if not solved by 1 PM.
ACROSS
1 Brought back ace detectives to probe extremely gruesome massacre (8) GENOCIDE {ONE<=}{CID} in {Gr...mE}
5 Injured ribcage, needs right device that reduces swelling (3,3) ICE BAG {rIBCAGE}*
10 Park near a city in California (7) GARDENA {GARDEN}{A}
11 Worker rushed to pick up cold tin of alcoholic drink (4,3) BEER CAN {BEE}{R{C}AN}
12 Remain in bed in place close to workshop (3,2) LIE UP {LIEU}{w...oP}
13 Stylish renter captivates Dutch manager (9) INTENDANT {IN}{TEN{D}ANT}
14 Brave to tackle nervous thief showing sign of cowardice (5,7) WHITE FEATHER {W{THIEF*}EATHER}
18 What teacher might do at end of class to forget past mistakes (Continued in 6 Down) (4,3,5,5) WIPE THE SLATE CLEAN [DD]
21 Exhibition by director in compound after broadcast (5,4) TRADE FAIR {D} in {AFTER*}{AIR}
23 Reason to have square bed (5) ROOST {ROO{S}T}
24 Friend hosting popular artiste's last daytime performance (7) MATINEE {MAT{IN}{a...tE}E}
25 Waste time in bash controlling old fellow getting high (4,3) G?O? O?F ()
26 Assess again as retreat's largely revamped (6) RERATE RETREAt*
DOWN
1 Group of animated people shaking a leg after drinking grog on vacation (6) GAGGLE {A+LEG}* over {GroG}
2 Queen enthralled by seven, rare butterflies (6) NERVES {NE{R}VES*}
3 Fellow's angry about wife's latest unkind remark (5,4) CHEAP SHOT {CH{wifE}APS}{HOT}
4 Unable to function and inert? Had weed at rave (4,2,3,5) DEAD IN THE WATER*
6 See 18 Across (5)
7 Second expert checking husband's lumbago (8) BACKACHE {BACK}{AC{H}E}
8 Endless spell involved in magical being's birth (8) GENITURE {GENI{TURn}E}
9 Italian on round trip enthralled by a smart, attractive woman (1,3,2,3,5) A BIT OF ALL RIGHT {IT}{O}{FALL} in {A}{BRIGHT}
15 PM of Cuba leaving oceanfront complex (9) AFTERNOON {OcEANFRONT}*
16 Write to master about cheater (3-5) TWO-TIMER {WRITE+TO+M}*
17 Slop in small dish (8) SPLATTER {S}{PLATTER}
19 Almost jump and run excitedly to receive Oscar award (6) HONOUR {HOp}{RUN*} over {O}
20 Gasp! No power in filthy place that's airless (6) STUFFY {ST{pUFF}Y}
22 German painter in ultramodern studio (5) ERNST [T]
Reference List
Right = R, Cold = C, Stylish = IN, Dutch = D, Director = D, Square = S, Popular = IN, Queen = R, Husband = H, Italian = IT, Cuba = C, Master = M, Small = S, Oscar = O, Power = P
