Solution to 19D has been deliberately left unsolved and is to be answered 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.
ACROSS
1 Daydream with a list Catherine prepared (6,2,3,3) CASTLE IN THE AIR*
10 Romeo wears ring that is expensive (5) PEARL {PEA{R}L}
11 Newly made to inculcate American virtue - a duty that's proportionate (2,7) AD VALOREM {MADE}* over {VALOR}
12 One eating fruit, time for some food (7) ALIMENT {A{LIME}N}{T}
13 Able to stop the boys' return - it's a disgrace (7) SCANDAL {CAN} in {LADS<=}
19 Suspect lets alarm go off (5,1,3) SMELL A RAT*
20 Poor creature loses wicket to throw it all up (5) RETCH wRETCH
22 Invested in final round, one day later (7) ENDOWED {END}{O}{WED} What's the role of 'later'?
25 Tie in writing charms (7) MASCOTS {M{ASCOT}S}
27 Bad in law to accept - in other words, it is ambush (3,2,4) LIE IN WAIT {IN+LAW}* over {IE} with {IT}
29 Amass gold - times change and it becomes the most sought after thing (10,4) COLLECTORS ITEM {COLLECT}{OR}{TIMES*}
DOWN
3 It shows approximate inner diameter of a hat (5) TILDE {TIL{D}E}
5 In a vestment you can see parts of the church (5) NAVES [T]
6 Dutch also shout outside (9) HOLLANDER {HOLL{AND}ER}
7 Bitter, free undercurrent (5) ACRID {RID}<=>{AC}
8 Animal sacrificed - went on and on (7) RAMBLED {RAM}{BLED}
9 Twist well, get right home (6) SPRAIN {SP{R}A}{IN}
15 A weapon receives modest grant (9) ALLOWANCE {A}{L{LOW}{ANCE}
17 Adjust input schedule on the cockpit instrument (9) ALTIMETER {AL{TIME}TER}
18 Reason to restrict booze consumption (9) RATIONALE {RATION}{ALE} Consumption is superfluous
19 Back in the centre carrying pound of varnish (7) S?E?L?C (Addendum - SHELLAC {bACk}<=>{SHELL}- See comments)
23 Live long with crude rising (5) DWELL {L}{LEWD}<=
24 It's foolish without reading the outline (5) DRAFT {D{R}AFT}
26 Part of Egypt somewhat soars in air (5) SINAI [T]
Reference List
Romeo = R, Time = T, Right = R, Wicket = W, Writing = MS(Manuscript), Gold = OR, Diameter = D, Home = IN, Hard = H, Long = L, Reading = R

2d ticks:acari off/to kill:cide &litt!
ReplyDeleteGood explanation 👏. Basically it refers to HIT ( cockroach killer).
DeleteSathia
This comment has been removed by the author.
ReplyDeleteSeveral good clues. Also, many tough ones. As expected from Arden.
ReplyDeleteAd Valorem- a word in day to day use for those familiar with Central Excise routines (Before days of GST)
ReplyDeleteAriane/ Naira.
ReplyDeleteFrench rocket now almost forgotten. Naira - a rare currency. Makes it difficult unless you get some crossings.
Today also, tile = hat has come in.
DeleteSathia
Yes Sathia. Missed it completely.
DeleteA Wonderful CW given by Arden today also.
ReplyDeleteAs usual new words to learn. Thanks!
Sathia
Endowed- Col.'s question about Wed.
ReplyDeleteWas this CW expected to be out on Tuesday?!
~ Approximation extended to pronunciation, Making it a symbol for homonym also?
ReplyDelete19d. SHELLAC. - Varnish
ReplyDeleteSHELL. - Pound (verb, bombard)
AC. - bACk in the centre
Carrying- To denote AC follows SHELL
19 D - Varnish = SHELLAC
ReplyDeletebACk in the centre = AC
pound (verb) = SHELL
AC carrying SHELL = SHELLAC
19D:shellac=varnish
ReplyDeleteback in the centre(ac)
carrying(having above), pound(shell)
(shell)(ac)
19d SHELLAC=varnish
ReplyDeleteb̶ACk̶ in the center, carrying *pound*=SHELL