Cryptic crossword No 2,720

Across

1. Quiet about conflict. Never first to give notice (7)
2. Happily cleared out bent cop sir, finally guilty of deception (9)
3. Plenty of nuance bad for a change (9)
4. Essentially, immorality is spoken (4)
5. Number one and two points causing row  (5)
6. Sketch Charles in Prague maybe in entrance to castle (10)
7. Severe northern bird (7)
8. Perfect group! Back to the beginning (4,6)
9. Defends mongrel in bishops' offices (7)
10. Bird loses foot, or a part of it (4)
11. Principal takes school's punishment for leaders (9)
12. Have a go at the start of fight after dropping an E (5,2)
13. One's Pavlova à la Berlin is served (9)
14. Proprietress is head over heels maintaining energy but not love to start over (5)
15. Laid back without the French issue (5)
16.  Penny trapped by broken rail and a bit of spring. (5)

Down

1. Home owner provides string for cat? Sound! (4)
2. Regularly scroll down? Some guts! (5)
3. Bell sounds outside healthy homes (9)
4. Victor with cut middle (5)
5. Maybe Queen Victoria beats up BBC liar (6,3)
6. Seven is disorderly, so 2, 8 and 12 are examples (5)
7. Famous or bad? Reelect anyhow (10)
8. Maybe Roman snail a tiny bit stuck up (7)
9. Caught cattle by the sound of it (5)
10. Regulations of church holding party up (4)
11. Hitchcock's role in North by Northwest? (9)
12. Raisin' Aunt Sal poorly (7)
13. Less mature solver adds noun and gerund (7)
14. Long-lasting haircut gets an extravagant ten (9)
15. Working UN icon flat out (10)
16. Spinning around without half of head is hard to sustain (7)