Cryptic crossword No 3,726

Across

1. Accused criminal left inside - there's only one way out of it (3,2,3)
2. F1 racer on small team that makes things faster with every turn? (11)
3. Originator of boomerangs getting knocked unconscious (7)
4. Most ignorant slander, in retrospect, most appropriate (7)
5. One with obvious bandaging? (7)
6. Record gastroenteritis cases (5)
7. Clarinet playing short note in composition (7)
8. Dignity of ex-PM interrupted by joke (7)
9. Fails to win darling's heart with flowers, runs away (5)
10. Mark's cabin on ship evacuated (7)
11. Boast about a lot of old nonsense (7)
12. Group walk around Sussex occasionally (8)
13. Smack addict coming first to get car part (3,4)

Down

1. Cocktail method with large amount of vodka for starters (7)
2. Less charmed when son becomes Republican (7)
3. Emergency workers treating aide with cramps (10)
4. Admires muscle, pauses to squeeze it (8)
5. Golf shot skirting hole, fellow to quit (3,3)
6. Picked up delivery in dock (5)
7. One that slips from cliffs, beginning to scale to the top (6)
8. US behind crushing king's demands (4)
9. Big tank that supplies tugboat? (5,5)
10. Closest friend heads off in car (6)
11. Musicians might pick these items of clothing (1-7)
12. Marine being trained: destroy after striking first (6)
13. Top athlete? (6)
14. Deceptive company leaving number with regret (6)
15. No difficulty with contents of puzzle (4)
16. Tripe perhaps spoiled meal, half thrown away (5)