No 13070, Monday 19 Oct 2020, Hypatia

Solution to 20A 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
7   You and I rose, for one backing Professor Lupin, say (8) WEREWOLF {WE}{FLOWER<=}
9   Artificial flowers at zoo cages (6) ERSATZ [T]
10 Survive being old, quietly in Church (4) COPE {C{O}{P}E}
11 One stops a car, parked and able to shift (5,5) BRAKE PEDAL*  
12 Sound from sailor in base (6) VIABLE {VI{AB}LE}
14 Colourful festival at noisy bar is all-inclusive (8) HOLISTIC {HOLI}{STIC}(~stick)
15 How moors are becoming places for people trying to get fit? (8,5) CHANGING ROOMS {MOORS}* [RA]
18 Packed meal carried Spooner’s hair ball (3,5) BOX LUNCH (~ locks bunch)
20 Quickly given consent orally, get comfortable (4,2) C?S? U?  (Addendum - COSY UP {'COS}{YUP} - See comments)
21 They recollected conducting strike on stage as a way to communicate (10) TELEGRAPHY {TE{LEG}{RAP}HY*}
22 Crossing river, pick up plant (4) BURY {BU{R}Y}
23 Exercise reeling fish in — it isn't worth much (6) PEANUT {PE}{TUNA<=}
24 Say, Gold can put back Nano component of atmosphere (8) NITROGEN {EG}{OR}{TIN}<={N}

DOWN
1   Show Eve’s first-born rising as one possessed by the devil (8) DEMONIAC {DEMO}{CAIN<=}
2   Nothing more than an old lake (4) MERE [DD]
3   Lie about love — an empty lie is a minor flaw (6) FOIBLE {F{O}IB}{LiE}
4   Ridicule stifling fine craftsman (8) JEWELLER {JE{WELL}ER}
5   In line with Mumbai neighbourhood’s scandals (10) ASPERSIONS {AS PER}{SION'S}
6   Artist depicted clouds (6) STRATI*
8   Light and fashionable, the cooking vessel is an instant hit (5,2,3,3) FLASH IN THE PAN {FLASH}{IN}{THE}{PAN}
13 Dance shows getting money finally? Certainly! (2,3,5) BY ALL MEANS {B{m..eY}ALL}{MEANS}
16 Make teenager mad (8) GENERATE*
17 Article Indian took out from second row in store (8) SQUIRREL {S}{QU(-a+i)IRREL}
19 Discharged old boy died without notice (6) OBEYED {OB}{EYE}{D}
20 Animal firm yet unsteady incubating egg (6) COYOTE {CO}{Y{O}TE*}

22 Help promote new arrival (4) BOON NOOB<=

Reference List

Old = O, Quietly = P, Church = CE, Sailor = AB, River = R, Exercise = PE, Gold = OR,  Nano =N, Second = S, Indian = I, Old boy = OB, Died = D