Solution to 4A 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 solve, if not solved by 1 PM.
ACROSS
1 Penny's fortunate and brave (6) PLUCKY {P}{LUCKY}
4 A bit shy before my church singers do this (6) ?C?R?H (Addendum - SCORCH {Shy}{COR}{CH} - See comments)
10 Spooner's labelling rotten bananas (7,3) BARKING MAD (marking bad to barking mad)
11 Followed author's boring story to date (6) TAILED {TA{I}LE}{D}
12 Praise champion sheltering pop and daughter (8) ACCOLADE {AC{COLA}{D}E}
13 Boost phone software to cover North and Southeast Asians (9) FILIPINOS {FILIP}{I{N}OS}
15 Detailed inspection for boss (4) STUD STUDy
16 Broken hut abandoned in rocky Halibut island (4) BALI hALIBut*
17 Make a hole in paper for a template (9) PERFORATE [T]
21 Play interrupted by a gun shot in house (8) BUNGALOW {B{A+GUN}*LOW)
22 Oddly took around two hours plus to weed out (6) UPROOT {TwO+hOuRs+PlUs}<=
24 Boys in blue pants strike behind with padding material (6,4) BUBBLE WRAP {BU{BB}LE*}{RAP}<=>{W}
25 Elected representative briefly backing American plant (4) AMLA {MLA}<=>{A}
DOWN
1 Joke and poke with one's tongue (7) PUNJABI {PUN}{JAB}{1}
2 Before you return, get thali meal at last (5) UNTIL Tail Acrostic
6 Got a rule modified by writing to SEBI, say (9) REGULATOR {GOT+A+RULE}*{R}
7 Fiercely adored by husband and treasured (7) HOARDED {ADORED}*<=>{H}
8 Do owners thus fail to keep a promise? (5,4,4) BREAK ONES WORD {DO+OWNERS}* [RA]
14 Say throw up bile after ailing and faint (9) ILLEGIBLE {EG}{BILE*}<=>{ILL}
16 Modern boutique delivering single bunch of flowers (7) BOUQUET BOUTiQUE*
18 Message about uniform given to father with school slip (4,3) FAUX PAS {FA{U}X}{PA}{S}
19 Extremely lethargic trail outside European city (3,4) TOO SLOW {TO{OSLO}W}
20 Switching sides, digs without right tools (6) PLIERS {P(-r+l)LIES} over {R}
23 Come to power (5) REACH [DD]
Reference List
Penny = P, My = COR, Date = D, Daughter = D, North = N, Boy = B, With = W, American = A, English = E, Key = ESC, Wicket = W, Pound = L, Writing = R, Husband = H, Uniform = U, School = S, Right = R