Across
1 Go after Asian river business (8)
5 In Tolkien, Tom Bombadil’s put six feet under . . . (6)
10 . . . Baggins (hobbit) heartily upset about Bombadil’s end (5)
11 Embargo on ballistic missile (9)
12 Produce item of jewellery found inside container (5,2)
13 Battle of New Orleans? (7)
14 About average on violin, having committed tune to memory originally (4,2,8)
17 One altering certain features in a theatre? (7,7)
21 Hot drink required in not entirely warm French castle (7)
23 Terrible tsar stuck on promontory in novel (7)
24 PM includes this one not far away (9)
25 Group’s leader brought in awful song (5)
26 Former Scottish philosopher, the pposite of 5 (6)
27 Knowing nothing, such a crossword can’t be solved! (8)
Down
1 Drink — one tipple brought in by me (6)
2 From a republic in Africa, a young man’s turned up to see spiritual leader (5,4)
3 Small lumberjack, one who toils (7)
4 Ornate orb connoisseur misrepresented in book (8,6)
6 Annoyed, wanted to catch learner driver (7)
7 Being broadcast from Barcelona, ironically (2,3)
8 Past patron saint causes an exclamation (2,6)
9 Legal walk (14)
15 Train in club on piece of gymnastic equipment (4,5)
16 Watch tapes etc., haphazardly (8)
18 Article on more complex proposition that has been proved (7)
19 Haughty and extremely excitable man of high rank abroad (7)
20 Time off in bay (6)
22 A long letter (5)
