Solution to 12A has been deliberately left unsolved and is to be answered 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 Chemist's quick to wrap wound (8) PHARMACY {P{HARM}ACY}
5 Reportedly delivers heavy woollen fabric (6) FRIEZE (~frees)
9 &13 They are used to revive sailors with BO? (8,5) SMELLING SALTS {SALTS}<=>{SMELLING}
10 It can hold breakfast food for one - greasy pot originally lined with copper (6) EGGCUP {EG}{Gr...y}{CU}{Pot}
12 Opponents try drills. Many give up (4,5) L?S? H?A?T ()
13 See 9A
14 Top trends in poems (4) ODES {mODES}
16 Temple town's function for a zealot (7) PURITAN {PURI}{TAN}
19 Obscure quotations seen in memes regularly (7) ECLIPSE {mE{CLIPS}mEs}
21 Panel changing sides in a month (4) JURY JU(-l+r)RY
24 Country's popular face left out (5) INDIA {IN}{DIAl}
25 Pin ads around a flyer (9) SAND PIPER {PIN+ADS}*{PER}
27 AI software not opening novel - it's an irritating problem (6) IRITIS {sIRI}{ITS*}
28 Primarily many people excited in arena, resulting in this? (8) STAMPEDE {STA{Many}{Pe...e}{Ex...d}DE} Semi&lit
29 One suffering hurt before try-out (6) MARTYR {MAR}{TRY*}
30 Woman is pinched by spoilt kid, most rude (8) BRASHEST {BRA{SHE'S}T}
DOWN
1 Step dancing with extremely lovable crush (6) PESTLE {STEP*}{Lo...lE}
2 Doctored images revealing bias (6) AGEISM*
3 Enrich soil greatly, taking in fertilisers essentially (5) MULCH {MU{f...iLi...s}CH}
4 Dismiss very stupid person in campaign (7) CANVASS {CAN}{V}{ASS}
6 Administrator is back, charged with direction to rule (9) REGISTRAR {R{E{GIST}RA<=}{R}Anno not clear
7 Intensify police case, missing deadline (8) ESCALATE {CASE*}{LATE}
8 Showing ten pigeons flying all around (8) EXPOSING {E{X}POSING*}
11 Break small plaything (4) STOP {S}{TOP}
15 Evil God filled with power, chiefly crazy (9) DEPRAVITY {DE{PR}{crAzy}}ITY}
17 Idle vagrant, a bit intoxicated, overwhelmed by strange fever (8) DELIRIUM {IDLE*}{R{In...d}UM}
18 Glue dries for the most part, turning more muddy (8) SLUDGIER {GLUe+DRIES}*
20 Some require a strategic direction (4) EAST [T]
21 After a month, bread counter becomes cleaner (7) JANITOR {JAN}{ROTI<=}
22 Ball's area (6) SPHERE [DD]
23 Tune with hint of romance… girl starts crying (6) URGENT {TUNE+Ro...e+G}*
26 American uncle excited about cats (5) PUMAS {SAM}{UP}<=
Reference List
Function = TAN, Popular = IN, Very = V, Small = S, American uncle = SAM