Cryptic crossword No 3,995

Across

1. Perhaps Nellie Melba and Joan Sutherland made strangely small (5)
2. Ultimately, will Che swear to you, Marx is source of novel 13 across 21 26 (6)
3. Leader of Bolshevik mob, Che embracing one King and looking less consistent (9)
4. City's name when aristocratic leader evicted, tilting briefly radical? (9)
5. Make fresh with itsy bit removed from wiener put back (5)
6. Sound reinforcement used in the chorus (4)
7. Tory leader only dropped line for Blair in Number 10 (4)
8. Awkwardly squeezed and oddly schooled, drone rebelled (10)
9. See 13a
10. An ole curmudgeon turned Olympic host (9)
11. Hurriedly wrote small cheat sheet, then haemorrhaged (9)
12. See 13ac
13. Article depicted prince as embarrassment (6)
14. Pause dispatch while American postal head is imprisoned (7)
15. Claim Che terribly rough, crossing major player in 13 across 21 26 (7,8)
16. After wandering far path, E.T. to phone home in 27 5 down 20's 18 24 winner (3,7,2,8)

Down

1. Made strangely large 24 (5)
2. Firm strike with not one to earn, which aimed to resist the power of capital (9)
3. Muscles in with the booze? (8)
4. American city by river, in the mostly tortuous home of 13 across 23 down the 26 House? (9)
5. Dolly upset George in Number 10 (5)
6. Log decor changed to accommodate recent leader (6)
7. Problem with foot, not head, which was responsible for strike (5)
8. See 1ac
9. Little singer's breast inspiration for artist tackling love (8)
10. Vetoes drove sire crazy (9)
11. Is it not possible for one to observe endless form of 26? (9)
12. Firm veto based on America being greedy (8)
13. We're silly to carry shotgun pellet for arachnid? Perhaps! (6)
14. You might be in Italy, right in this city (5)
15. Without repeating line, shout down (5)
16. Prize may be a drawback (5)