Cryptic crossword No 4,074

Across

1. Condition of mushrooms is reported (6)
2. Diplomatic philosophy: return Gibraltar and stand fast (3,5)
3. Terribly bad brine in which to keep bagels (5,3)
4. Articles about sixth, seventh, and eighth hound (6)
5. Little men when they're tired after school (10)
6. Sure about ploy (4)
7. Anger New England lady who is after a horse (8)
8. Exactly zero spinners spinning (4,2)
9. Crab is able to note hesitation (6)
10. Oh! What a beautiful morning in this fine town house, mother! (8)
11. Southern hippie losing head here in London (4)
12. Vehicle American and Wolfgang crash: end in a mess (5,5)
13. Again, new teacher cut in half (6)
14. Goal: reach moon by end of Jan (8)
15. Teaching children excited by steroids, perhaps? Why? (8)
16. Most ironic railway in Cornwall (6)

Down

1. Listener of podcast that is unsettling (5)
2. T Parker and M Stone's creation is something provocative (5)
3. "Sandwich tree!" From this to the ridiculous? (7)
4. Spirit to forbid most of followers (7)
5. Gas less stupidly, see more clearly with these (7)
6. Flyer about idiot written up by sock-eater (5,4)
7. Where to learn about filly and stable boy losing head (9)
8. Exaggerate virtues of type of rock, nothing to puff up (9)
9. Maybe Tommy, Peter, perhaps Norma (4,5)
10. German teacher up for Italian meal (7)
11. Crone oddly confused about note (3,4)
12. Winning factor at Agincourt to want ribbon (7)
13. Saint's last to enter sacred surroundings hastily (5)
14. Paintings of epic onslaughts (5)