Cryptic crossword No 4,121

Across

1. Called that hag (5)
2. Grave centres of historic combat (4)
3. Partner of copper's a teetotaller, detective’s first to exit party before taste of gin (6,3)
4. Do wisecracks about bellies of roundish gentlemen (7)
5. Shivers from article by Native American, pretty sad initially (3,6)
6. Founder of company at 50 left before pleas for reform (8)
7. Air open to flying exercise (9)
8. Thrilling new column featured in papers (8)
9. Confounded by "Old Boy" cryptically (6)
10. Lids of point pens, perhaps? (7)
11. End of liver transplant nurses document (6)
12. Time of year to remain invested in Oscars regularly (7)
13. Die quietly when a little sick (4)
14. Family of cats, i.e. primarily lions, fed with piece of antelope jerky (7)
15. Develop mantra during church: "Not quite abandoned when close to God, first and foremost" (4,5)
16. I, when replacing you in vehicle, will show technique (5)

Down

1. Broadcaster of programme needing hospital emergency room (5)
2. Charge personnel going through cash box (6)
3. High-pitched sound in periodic parts of ballet recording (5)
4. Hoovers through seat slipcovers (4)
5. Bondage in multitudes is fine when included in agreement (5)
6. He droned freely, being polled (8)
7. Independent Arab state's covering no news when rioting (4,3,3)
8. Outline extremely sick environmental effect — no coming back (8)
9. Shaman and one Zulu in charge (6)
10. 9 & 21 might make one pence in market (5)
11. Recognise heartless Ken that hurt me (4)
12. At home, rejected weed for money, being at peak fitness (2,3,4)
13. This person will leave remarkably messy eater to be at peace (4,4)
14. Budget missing nothing, that guy notes constantly (3,3,4)
15. Go ape, soil pants, and say sorry (9)
16. Get undressed and drive between Sacramento and Flagstaff when on vacation (5,3)