Somewhere next to 34 and 12, 33 is 25, the highest mountain is 1D (two words), and the principal 3 and 39 are alongside each other in 19. Solvers must shade the clued light that is an anagram of the place’s name. Elsewhere, ignore two accents.
 

Across

 
1    Jittery Jonah hides Sonia and Sam’s stuff (11)
7    Writer of humourless English (3)
11    Plastic covering most of spout in extractor (6)
13    State name applied to murdered sheep-master (retired) (7)
15    Poet takes drug — Charlie? (5)
16    Flower beginning to grow in hollow (5)
17    Suit clothing good successful examinee (6)
18    Unit in grand hotel starts to tarnish if neglected (5)
20    Passing of the buck by head at fault (6, hyphened)
21    It’s said less sensible flatworms have them (5)
22    Chatter with priest about blend (7)
27    In a male sheep, round tumours (7)
29    Judge displaying some loopiness (5)
30    One elected supremo rudely shunning society
(6, hyphened)
32    Verse drama upset theatre (5)
36    Nag worried no women (5)
37    Divulge lecturer attends school (5, two words)
38    Rhetoric from cross Australian succeeded with me (7)
40    Pollarded money tree (3)
41    Nuts encore demon district leader (11)
 

Down

 
2    Wintry hail storming across Swiss city (8)
4    Manner twenty handled minimal IT? (12)
5    Ancient copper catches lively perches (7)
6    Sumerian ruins showing odd enlargement (8)
7    Spy’s twentieth scheme? (5)
8    Adelaide’s racehorse headed for whirlpool (4)
9    Golden gull up in tree
(6, two words)
10    Seaweed variety parrot half nibbled (5)
14    Balm guru blended with mace and dried dung
(12, two words)
21    General receives university fellowship (9)
23    Solitary individual’s probing what makes bricks (8)
24    Embracing deliberate harm, smack deputy PM (8)
26    Tree advanced canine is exploring (7)
28    Sound character adopts American sobriquet
(6, hyphened)
31    Prat’s apology Oscar twice rejected (hurt) (5)
35    Bloodsucker flourished on earth close to Transylvania (4)
 
A first prize of £30 for the first correct solution opened on 30 June. There are two runners-up prizes of £20. (UK solvers can choose to receive the latest edition of the Chambers Dictionary instead of cash— ring the word ‘Dictionary’.) Entries to: Crossword 2166, The Spectator, 22 Old Queen Street, London SW1H 9HP. Please allow six weeks for prize delivery.