Solution to 3D 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
8 Cess on one car (for hire) (4) TAXI {TAX}{1}
9 A fighter gets ring for Spanish friend (5) AMIGO {A}{MIG}{O}
10 Get submerged in washing place (4) SINK [DD]
11 Scary exclamation about louse egg and fish (6) BONITO {BO{NIT}O}
12 Dahlia arranged around outskirts of Hyderabad in pretentious manner (8) LAHDIDAH {LA{Hy...aD}IDAH*}
13 Princess’s flower’s ill fortune (8) DISASTER {DI'S}{ASTER}
15 Bug born and led astray (6) NEEDLE {NEE}{LED*}
17 Is tabby excited to look after young one? (7) BABYSIT*
19 Sir, some compounds are chemicals with same molecular weight but different arrangement of atoms (7) ISOMERS*
22 Composer hid the French chemical (6) BLEACH {B{LE}ACH}
24 Monstrous ladies with consuming interest? (8) OGRESSES [CD]
26 Chinese guy follows bird for accomplice (8) HENCHMAN {CH}{MAN}<=>{HEN}
28 Landlord certain to include question about commencement of insurance (6) SQUIRE {S{Q}U{I}RE}
30 Little data found in certain forms (4) INFO [T]
31 DIN or new ISO designed by Europe (5) NOISE {N}{ISO*}{E}
32 Arranged sale of drinks (4) ALES*
8 Cess on one car (for hire) (4) TAXI {TAX}{1}
9 A fighter gets ring for Spanish friend (5) AMIGO {A}{MIG}{O}
10 Get submerged in washing place (4) SINK [DD]
11 Scary exclamation about louse egg and fish (6) BONITO {BO{NIT}O}
12 Dahlia arranged around outskirts of Hyderabad in pretentious manner (8) LAHDIDAH {LA{H
13 Princess’s flower’s ill fortune (8) DISASTER {DI'S}{ASTER}
15 Bug born and led astray (6) NEEDLE {NEE}{LED*}
17 Is tabby excited to look after young one? (7) BABYSIT*
19 Sir, some compounds are chemicals with same molecular weight but different arrangement of atoms (7) ISOMERS*
22 Composer hid the French chemical (6) BLEACH {B{LE}ACH}
24 Monstrous ladies with consuming interest? (8) OGRESSES [CD]
26 Chinese guy follows bird for accomplice (8) HENCHMAN {CH}{MAN}<=>{HEN}
28 Landlord certain to include question about commencement of insurance (6) SQUIRE {S{Q}U{I}RE}
30 Little data found in certain forms (4) INFO [T]
31 DIN or new ISO designed by Europe (5) NOISE {N}{ISO*}{E}
32 Arranged sale of drinks (4) ALES*
DOWN
1 Ex–British Prime Minister has egg and a thick cold sauce (4) MAYO {MAY}{O}
2 Perhaps, armed forces immorality... operating in absence of Medical Officer (8) MILITARY IM
3 Elephant driver’s ham? (6)
4 Small mountain railway carries a Clinton’s wife (7) HILLARY {HILL}{A}{RY}
5 They can be sweet between bedfellows (8) NOTHINGS [CD]
6 Hope to climb a steeple (6) ASPIRE {A}{SPIRE}
7 Indian Chartered Accountant goes to South American empire (4) INCA {IN}{CA}
14 Badly uninstall, losing nuts altogether (2,3) IN ALL {
16 Big and regal. Confused? (5) LARGE*
18 Cruel Indiana male in shade (8) INHUMANE {IN}{HU{MAN}E}
20 Brawny curs maul badly (8) MUSCULAR*
21 Find out excitedly and announce using this exclamation (5,2) FOUND IT*
23 Sancho rode, carrying TV personality (6) ANCHOR [T]
25 The remaining journalist took a break (6) RESTED {REST}{ED}
27 Bird from Northern Europe (4) ERNE [T]
29 Animal returned to tall, hollow plant (4) REED<=
Reference List
The in French = LE, Question = Q, New = N, Europe = E, Railway = RY, Indian = IN, Indiana = IN, Journalist = ED