Cryptic crossword No 2,274

Across

1. Dressy female's moral confusion (6)
2. Improvise tune: go to get mouth organ (6)
3. Holiday mishap (4)
4. At certain times, cocoa is non-negotiable (2,8)
5. Spoil company's scheduled merger (6)
6. Two sailors in charge of acid (8)
7. When rewritten around start of century credo was something above criticism (6,3)
8. Fish acquired from Billingsgate (4)
9. Take advantage of returning in black limo (4)
10. The French unexpectedly deny overturning British rule to get electrical equipment (6,3)
11. Hot pie cooked with cornmeal crusts and pepper (8)
12. Why you start to munch again, it's delicious (3-3)
13. Wandering ram comes across fair (8,2)
14. Flavour of Eton mess (4)
15. Analyses, for example, content of Trump's backside (6)
16. Local gardens turned over in parish tragedy (6)

Down

1. Old country depicted in motif or mosaic (7)
2. Sheets of badly written prose (5)
3. Takes place of cowherd to start with, leading beasts (6)
4. Period before Labour got seat in assembly (9)
5. Wearing fancy red gown I miss beginning of waltz (7)
6. Jittery opponents met first of several delays (13)
7. Chose exercises in wordbook (5)
8. Appears not to be oneself (4-5)
9. Two old ladies eating pork pie and sage? (7)
10. Fail to stop talking (3,2)
11. Old boy grooming a mule shortly before sunrise (7)
12. Gayest production is a bit OTT (6)
13. Leaders of musical organisation take exception to choral piece (5)