Solution to 5D 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 answer, if not solved by 1 PM.
THREE TRICKY ONES
ACROSS
9 One gets complaints so dumb! Am flustered and close to exhaustion (9) OMBUDSMAN {SO+DUMB+AM}*{e...oN}
10 Wicked bouncer, jaffa? Look, concentrate, finally duck (5) DRAKE Tail Acrostic
11 Take it quietly, go on (7) PRESUME {P}{RESUME}
12 Breathe fire (7) INSPIRE [DD]
13 Turn vessel collecting drip (5) PIVOT {P{IV}OT}
14 A question about relationships (9) EQUATIONS*
16 Sec. censored porn scattered in letters (15) CORRESPONDENCE*
19 Maybe insert a comma in wordplay; cut roughly at end of phrase? (9) PUNCTUATE {PUN}{CUT*}{AT}{p...sE}
22 Frenchman and German captured by spies backing trickery (5) MAGIC {M}{CI{G}A<=}
24 Tried miserably sad eyes (7) ESSAYED*
DOWN
1 Enliven very plump-at-the-core small dog (4,2) SOUP UP {SO}{plUmp}{PUP}
2 Witness some deliveries bearing "Bombay Stock Exchange" sticker at the bottom (8) OBSERVER {O{BSE}{s...eR}VER}
3 Student jam triggered change (10) ADJUSTMENT*
4 Victim: pedestrian hanging outside bar (6) IMPEDE [T]
5 Tailless lizard — it can be black or red on top — from a Caribbean island (8) ?N?I?U?N ()
6 Podcaster's sales pitches for supplements (4) ADDS (~ads}
7 Some countered: London is actually a better place? (6) CASINO [T<=]
8 Oracle up, reinforced by tax breaks (8) RECESSES {SEER<=} over {CESS}
15 The real aim, ultimately, is to start to reverse-engineer a semiconductor device (10) THERMISTOR {THE}{R}{aiM}{IS}{TO}{Re...r}
17 Congratulations, extremely professional investigations! (8) PLAUDITS {Pr...aL}{AUDITS}
20 More demanding about one's working post-retirement (6) NOSIER {RE}{1'S}{ON}<=
21 Editor passes on some current events (6) EDDIES {ED}{DIES}
23 Catholic feels sorry for priest getting ignored in urban areas (6) CITIES {C}{pITIES}
Reference List
Quietly = P, Drip = IV, Frenchman = M< German = G, Real = R, Before = ERE, About = RE, Editor = ED, Catholic = C, Priest = P
