Cryptic crossword No 2,502

Across

1. Convert initially rebellious faction? Press boss did it (10)
2. Animal seen by some when cycling across Alabama (5)
3. American curtailed scheme to have shelter built around tree (3-5)
4. Quietly advocating a clear-out (7)
5. Wooden piece contains new pine (4)
6. Guinness gulped by genial eccentric (4)
7. Specific branches etc where New Yorkers might pick sandwiches? (7)
8. Caution joker with cry: "that hurts!" (6,4)
9. Car crash when motor racing leader's caught (6)
10. The French backing safe environment for eco-warriors! (7)
11. Periodically supplies housing support for section of church (7)
12. Maybe whistle opening piece from musical entering seedy hub hotel (9)
13. Spooner's to purchase launch as rescue vessel ... (8)
14. Blunder in final part of third encore from The Glands (9)
15. Instrument, a number of which go down here (5)
16. ... vital vessel, or craft, seriously bereft of leadership (6)

Down

1. Tense in registry office, Gok Wan's distinctive intonation (5)
2. Investigator starts to examine mysterious erotic lines in comic (4,5)
3. Pops tax on one more thing (4)
4. Good woman straddling Greek character is an obscenity (4)
5. Handle spinning cross with ascending punch (8)
6. Coot reportedly first to strip - that'll grab the attention (3-6)
7. Spot cream cakes in comms department (8)
8. Contents of the pit of the stomach: ultimately, carrots (diced) (9)
9. Help teen struggling to control old dog in Stratford (9)
10. Snubbed order to split 50% saving? (5)
11. Were jumps in girly horse movie? (4,5)
12. Old people's advisors going round plugging excellent calculators (5)
13. Setter, doctor and old queen associate (6)
14. Evacuation applies to Olympic crowds (5)
15. Noise made by hen showing love for a mollusc (6)
16. Gastric band immoral - unsettling case for manager to unravel (9)