I’ve kept the blog brief – we’re all lined up ready to field any further clarifications which may be required.
ACROSS
1. Bedroom – sleeping place. BROOM outside ED.
5. Spot – double definition.
8. Needled – irritated. NEEDED outside lake (L).
9. Grain – wheat perhaps. Good (G), RAIN.
11. Cross-section – a representative sample. Angry (CROSS), anagram (damaged) of NOTICES.
12. Drover – mover of livestock. (R)esiding inside DOVER.
14. Donjon – tower (central keep of mediaeval castle also know as dungeon). Party (DO) and taking place (ON) outside New Jersey (NJ). I vaguely remembered this when I’d pieced ‘do’ to ‘NJ’ so I was confident putting it in. Still guessable, I think, if you hadn’t heard of it.
15. Non-conductor – wood in one sense. This is the second knotty one perhaps. Wood doesn’t conduct electricity. Toscanini was a famous conductor so ‘not him’ is non-conductor.
17. Mason – stoneworker. Parent (MA), offspring (SON).
18. Storage – cost of keeping. (O)ld (R)elics inside STAGE.
20. Toys – playthings. Sen(T) t(O) livel(Y) youngster(S).
21. Grown-up – mature. Set (GROUP) outside opponents at bridge (WN).
DOWN
2. Eye – organ. Homophone of ‘aye’.
3. Radio – communicate with. RIO outside a (A), daughter (D).
4. Overstrung – intensely strained. Upright pianos are (apparently) all overstrung and underdamped. These terms describe the layout of the stringing and the position of the dampers within the mechanism of the piano. So now we all know.
6. Puritan – a strait-laced moralist. PUN around RITA.
7. Tricolour – flag. Rhode Island (RI) and colonel (COL) inside TOUR.
10. Head-hunter – primitively collector of trophies. Anagram (dreadfully) of HAUNTED HER.
11. Cormorant – sea bird. (C)lacton, (RAN) inside an anagram (broken-down) of MOTOR.
13. Victory – win. Woman (VI), (C)elebrate, Conservative (TORY).
16. Throw – confound. (TH)e, argument (ROW).
19. Gnu – wildebeest. (G)e(N)i(U)s.
With just 15a remaining, and not knowing much about Toscanini, I needed the “check” button to tell me that TRICOLORE for 7d was wrong (it’s the French / Italian spelling, apparently; also the one I remember from the title of a French textbook).
Also I’d made up a word BEDRUSH for 1a, which held up 4d, but the less said about that the better.
DONJON was the new and unfamiliar word of the day, but I guessed it correctly.
OK, OK, I did exactly the same.
Brian
I think you are right. Wood isn’t a non-conductor (of either heat or electricity), but it is a very poor conductor (of both), otherwise moisture meters (designed to estimate the moisture content of wood) wouldn’t work, and your desktop wouldn’t feel warmer or colder than your hand when you touched it.
Pedant, Surrey
The interesting thing is that Wood is also the name of a famous conductor: namely, Henry Wood who founded the Promenade concerts in 1895, now in the Royal Albert Hall. I suspect that’s coincidence though, or maybe not…
Rita
As for the non-conductor – the only negative I see is ‘not’ Toscanini. So I stand by the blog – the word play being not a conductor so non-conductor. Whether it is technically true that wood is a non conductor is covered in other comments.
bandjo