No 11497, Friday 11 Sep 2015, Scintillator

Early morning refresher, for some, all the way. Mine's Tea. Troubled in the NW corner.

ACROSS
1   In case of coming back in future, that's not a drain (6) FILTER {FI<=}{LaTER}
4   Decoct for a nice drink without milk (4,4) CAFE NOIR*

9   Sufficient reason to prevent a plane from flying (6) GROUND [DD]
10 Command everyone to drink in Hindi? (8) SUBPOENA (~sab peena)
12 Peripheral elements of electromagnetic noise over the moon (8) ECSTATIC {El...iC}{STATIC}
13 It's regular treat for a group of musicians (6) SEXTET {SEX}{TrEaT}
15 Danger in climbing apartments (4) TRAP [T<=]
16 Old Indian car of a diplomat (10) AMBASSADOR [DD] Not necessarily Old!
19 Therapy-induced goitre can be treated without iodine (10) IATROGENIC {GOITRE+CANBE}* around I
20 Fail to include note in books (4) OMIT {O{MI}T}
23 Publicise odds and criticise fiercely (6) SPLASH [DD]
25 Certified cadet set target to turn over in part (8) ATTESTED [T<=]
27 When playing sitar, hear creative genius (8) ARTISTRY {SITAR*}{TRY}
28 Half of new recruits taking care of wall painting (6) FRESCO  {FREShmen}{C/O}
29 Heads of plants protested riots following sacking of director (8) TREETOPS PROTESTEd*
30 Precious items from Fagin largely sell out (6) JEWELS {JEW}{SELl*}

DOWN
1   A forbidden fruit signified an illusion (7) FIGMENT {FIG}{MENT}(~fig meant) (Addendum - {FIG}{MEaNT} - See comments)
2   Be smart to expect a tense Mrs. to be upset (4,5) LOOK SMART {LOOK} {A+T+MRS}* Anno not clear
3   Three times four points advantage (6) ENNEAD {E}{N}{N}{E}{AD}
5   Be next to a bar (4) ABUT {A}{BUT}
6   Compel very much to eat after having energy drink (8) ESPRESSO {E}{S{PRESS}O}

7   Clearly showing up on time (5) OVERT {OVER}{T}
8   Plan's to procure a kitchen equipment (7) ROASTER {RO{A}STER}
11 More transparent and less realistic? (7) FILMIER [DD]
14 Server in public house is much obliged (7) BARISTA {BAR}{IS}{TA}
17 Give up advantage, eventually losing cup (9) DEMITASSE {DEMIT}{ASSEt}

18 She is out on shift to look after residence (5-3) HOUSE-SIT*
19 Second home's heartless insult (7) INSTANT {IN'S}{TAiNT}
21 Routine is due to be broken (7) TEDIOUS*
22 Eighteen scores of this might amount to zilch (6) DEGREE [CD] (18*20=360=0)
24 Not lasting the distance? Second coffee! (5) LATTE  Anno pending (Addendum - LATTEr - See comments)

26 Chief doctor's last word supporting intravenous therapy (4) DRIP {Do...r}{RIP}