The unclued lights (one of two words) can be preceded by the same word which is hidden in the completed grid. Solvers must highlight this word appropriately. All resulting phrases are verifiable in Brewer. Elsewhere, ignore one accent.
Across
1 Ought to be quiet when dreadfully loud (6)
7 Elysian areas of knowledge? (6)
12 Board for one in mental hospital? (9)
15 Governor’s gun brought back by a hill (9)
16 War god with worker bully (6)
20 Porridge making good man throw up (7)
21 Could be guaranteed this is treeless country? (6)
24 This could provide Mum with pie or stew (8)
27 Measure reflected in the valleys (3)
28 WWW system in your laptop (3, initials)
29 John returns after duck at Test Match venue (4)
32 Film stand-in is a dwarfish chap, it seems (8)
34 Noble youth’s beginning to change one who lost head (6)
37 Sportingly go down the Blue Shady Club (7)
39 Ladies posing as models (6)
42 Chemical process will restrict the bird supply (9)
43 Applause as one king left moving recital (5)
45 Paratrooper from Slovakia unknown to follower (6)
46 Fly in groups, last going first (6)
Down
1 Tax blow for fish (4)
2 The Vatican is, we hear, completely swell (7, two words)
3 Cromarty’s actor’s forename (4)
5 Military Cross received by hard-line, versatile unit? (8, two words)
6 Rebuilt home good inside? Initially met a lot of resistance (6)
9 Criminal is in late for prayers (8)
10 Mysterious Edwin died on cross (5)
11 Current way to produce greater efficiency (10)
14 Parliamentary essentials (9, or two words)
17 Marvellous exercise to run through boat (6)
18 Their real changes to ‘Less Like Other Worlds’ (9)
19 Model bust, so face darkens (10)
23 Bird allegedly arrived in outskirts of Southwell (6)
25 Smoothly repaired net, fully (8)
26 Box office in Bangkok without good cash records in it (8)
31 They cover pupils, including learner I had in English — OK? (7)
33 Strive for praise. That’s corrupt (6)
36 Jerk’s singular cry? (5)
38 Material that’s a little upsetting (4)
40 Much up for auction? (4, two words)
41 Duck appears headless, ascending (4)
A first prize of £30 for the first correct solution opened on 23 May. 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 2259, The Spectator, 22 Old Queen Street, London SW1H 9HP. Please allow six weeks for prize delivery.