Answer and Annotation for 12A left for any rookie commenter till 10 AM.
ACROSS
1 Perhaps I must clue about love with lady extremely carefully! (12) METICULOUSLY {I+MUST+CLUE}* over {O} and {L
10 Tactic lacking good scope (5) AMBIT
11 Get rid of upper class boxed mentality inciting needless argument at the beginning! (9) ELIMINATE {ELITE} over {M
12 Beat batsman essentially with a bit of angled flight (6)
13 Gets killed while going around water bodies due to ailments! (8) DISEASES {DI{SEAS}ES}
15 Diaper designed to trap secretion and leave no trace! (9) DISAPPEAR {DI{SAP}PEAR*}
16 Locks with hard beam (4) HAIR {H}{AIR}
20 Book without covers is bound (4) EDGE
21 Follow one another, playing Teen Taal interspersed with some Relas (9) ALTERNATE {TEEN+TAAL}* over {R
24 He’d sing extraordinarily to gain leading awards/titles! (8) HEADINGS {HED+SING}* over {A
26 Soldiers returning gold buried in locality (6) TROOPS {SPO{OR}T}<=
28 Academic expert in favour of capturing English vessel (9) PROFESSOR {PRO}{F{E}{SS}OR}
29 Mindful of a contest with Exa (5) AWARE {A}{WAR}{E}
30 Men outside rushed down to strike upset old relatives (12) GRANDPARENTS {G{RAN}{D}{RAP<=}ENTS}
DOWN
2 Spinner returns, getting ready for hugging! (9) EMBRACING {ME<=}{BRACING}
3 Batting to somehow avert loss by break time! (8) INTERVAL {IN}{AVERT*}{L}
4 Old dues settled (4) USED*
5 Started to nag editor crookedly to induct setter (10) ORIGINATED {NAG+EDITOR}* over {I}
6 Basically entered in, evaluated and took over! (6) SEIZED {S{E
7 Pines when knight’s away for long stretches of time (5) YEARS YEAR
8 Swallows drug on failure (5) LAPSE {LAPS}{E}
9 Cuts cess on plastic, overcoming resistance (7) CENSORS {CESS+ON}* over {R}
14 Australian opener set to eclipse record asked for forgiveness (10) APOLOGISED {A
17 NASA employee, say, arranged NASA tour on time (9) ASTRONAUT {NASA+TOUR}*{T}
18 Spinner’s initial following maybe happier in Spinner’s absence, probably! (7) PERHAPS {S
19 Become greater with sincere dancing, captivating audience, primarily! (8) INCREASE {SINCERE}* over {A
22 Came in running to spot where flicks are played (6) CINEMA*
23 Firstly, Australia smashes hapless English strugglers in battle for the urn! (5) ASHES Acrostic
25 Slam on grass held in between (5) AMONG [T]
27 Time rolled back by acceleration in space (4) AREA {ERA<=}{A}
GRID
