No 12430, Tuesday 25 Sep 2018, Lightning

ACROSS
1   Train with royal European carriage (8) REHEARSE {R}{E}{HEARSE}
5   Good man with urge to mend (6) STITCH {ST}{ITCH}
9   Turn game around with defence (8) ARGUMENT*
10 Measure physical structure to represent in words (6) EMBODY {EM}{BODY}
12 Insurers with appeal that is legal (5) LICIT {LIC}{IT}
13 Doctors at rift, to primarily take revenge (3,3,3) TIT FOR TAT {AT+RIFT+TO}*{Take}
14 Calling for aid at emergency room (6) CAREER {CARE}{ER}
16 Radical saint, one stuffing two diamonds say in retreat (7) DRASTIC {ST}{1} in {CARD<=}
19 Continental landmass whose area is united? Not exactly (7) EURASIA {AREA+IS+U}*
21 Penny missing the first distress call when money is received (3,3) PAY DAY {P}{mAY DAY}
23 Philosopher grades car tested in part (9) DESCARTES [T]
25 Part of support curtailed by church (5) PIECE {PIEr}{CE}
26 Very quick to grab ruptured clothes (6) ABRUPT [T]
27 Summons from large town falling short of quota right away (8) CITATION {CITy}{rATION}
28 Child’s organ? (6) KIDNEY (~kid knee) Homophone indicator missing? (Addendum - {KID}{NEY} - See comments)
29 Casual mail for new arrangement (8) INFORMAL {MAIL+FOR+N}*

DOWN
1   Genuinely concerning friend (6) REALLY {RE}{ALLY}
2   Tall cleaning lady boxes one furniture used for dining (4,5) HIGH CHAIR {HIGH} {CHA{1}R}
3   Let flier with appeal get married (5) ADMIT {AD}{M}{IT}
4   Spanish gentleman outwardly occupied with politician (7) SENATOR {SEN{AT}OR}
6   Engineer may report to intern (9) TEMPORARY*
7   Boast catching river fish (5) TROUT {T{R}OUT}

8   Shaky act wandering where it’s hard to find a needle (8) HAYSTACK*
11 Rivet stuck tightly under desk initially (4) STUD Acrostic
15 Lenient queen missing desire becomes simple (4,2,3) EASY AS PIE {EASY}{ASPIrE}
17 Seconds away, a prize must be arranged in a shape (9) TRAPEZIUM {A+PRIZE+MUsT}*
18 Response to toll on diamonds along with support (8) FEEDBACK {FEE}{D}{BACK}
20 Advance payment from kid without limits (4) ANTE bANTEr
21 Approve leader returning with zeal (7) PASSION {PASS}{NO1<=}
22 Core vegetable going around, consumed right now for starters (6) KERNEL {KE{Ri..t}{Now}EL<=}
24 Fragment lost without resistance (5) SHRED {SH{R}ED}
25 Private investigator with an old instrument (5) PIANO {PI}{AN}{O}

GRID