2235: Vile stuff

1/44 (eight words in total) is part of a question (in ODQ) minus a word exemplified by the other unclued lights (one hyphened). The title suggests a further example (eight letters) which will appear diagonally in the grid and must be shaded.

Across

11 Very good not quite excellent dish (4)
13 Awful prig with patent for round engine part (10, hyphened)
15 Gorilla regularly painting (3)
16 Bill’s mate collecting resin (7)
17 Sons prod skinflint (6)
19 British clown’s problem part of skull (6)
24 Don from near Grimsby is out jogging (5, two words)
26 Country seat with plonk where footballers play (9, two words)
28 Maximum surfer can see from rocky Consul Reef (duckless) (9)
30 Bottle inventor not big in Germany (5)
32 Score goal and make an impression (6, two words)
35 Some French fellow that eats flies? (6)
37 Artist and I painted English frogs (7)
39 Short notes about new fabrics (6)
40 Stroll by river trailing German punter (7)
41 Posh General Secretary feels loathing (3)
42 Toothless types in small radio broadcast (10)
43 Twin enthralled by thesaurus (4)

Down

3 Flapping auks hid brigands (7)
4 Old cannon – take aim first (5)
5 Dutch cooker possibly tops for fruiterer … (9, hyphened)
6 … caught in huge headgear (6)
7 Coloured stones and rocks (5)
8 Cry for attention anarchist let out (5)
9 Open heart of setter perhaps (4)
10 Drink? Mine’s not at all good (6)
12 Procedure no longer routine on circuit (8)
14 Crosses or gongs adorning man in Washington? (6)
19 Dope asked for round engine part (6, two words)
20 Aggressive female parrot (6)
21 Mainframes baffled TV hero (10, two words)
23 Sheepdog livid with blackbird (9, two words)
25 Aristo I’ve seen in pubs (8)
31 Mac’s freckled ear (6)
33 As a friend I mop up (5, two words)
34 Half of Brits like beans (5)
36 Chilly afternoon upset Charlie (5)
38 No ordinary assembly in Asian city (4)

A first prize of £30 for the first correct solution opened on 16 November.