Cryptic crossword No 1,504

Across

1. Has time unfortunately for impiety (7)
2. King say, sly one with no hair takes back apology for slipping up, even unheard! He’s well known for his transpositions (7,9,7)
3. Funnily I rely on having been promoted beforehand like one in service  (9)
4. Antagonise by moving last to the front creating a row (5)
5. Residential institution where 10ac might use this to rearrange locks (4,4)
6. Shares a common rhythm in speaking of depressions (6)
7. For starters 10ac wished evil on the police  (5,6)
8. Very tiny portion of a day (6)
9. 10ac spoke filthy stuff that ‘s never in doubt (4,4)
10. Take away limits of formal speech for proportion (5)
11. See 10
12. See 10
13. King say, with a little support for marine mammal (7)

Down

1. Managed to fire rifle (7)
2. Hunter at sea heard someone crying (6)
3. Angler traps in one who completes the job (8)
4. With no rehearsal I’m on time you heard (9)
5. A road or street, not here (4)
6. 10ac’s role  (6)
7. In part of one’s travel can nip back up to the very top (8)
8. One million notes at first seem extraordinarily massive (7)
9. Talk into rummage through a bewildering maze  (9)
10. Social gathering provides enjoyment before cocktail tonic (8)
11. Dying star consisting of  unusual gradient  (3,5)
12. Bring attention to stamp (7)
13. Examined 3 consecutive letters then passed on (7)
14. Difficult funnel shaped mouthpiece held by gutless tory (6)
15. Puts on a pedestal to chop up cloths evenly  (6)
16. An unusual rarified air first of all (4)