The unclued lights (three of two words, one of which has an apostrophe) are of two kinds.
Across
6 Eat away with genial wraith oddly (4,2)
12 Antibiotic disguised in nice pill (10)
14 He raises stock for reactor (7)
15 Second chapter on king and almost utterly mad literary character (4,6)
16 Medic enters to look round for old blunderbuss (7)
20 A country’s birds (4)
22 Intestinal trouble in Crete (7)
23 Cheat’s disappointment (4)
26 Currency of the red or blues distributed (7)
30 Runs by Hassett regularly upset old emperor (4)
31 Rough cowl on chimney in Portree (7)
34 Key that’s silver every so often (4)
36 No Dream arranged like Ansermet’s ‘Suisse’ orchestra (7)
38 Secret rivalry at home leading to struggle (2-8)
40 Cotton thread left by 34 (5)
41 Feeling of extreme anxiety left gunmen wandering (10)
42 Rainbow-coloured dress, first seen after I get up (6)
43 Tops gran knitted for a number (4-4)
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