Cryptic crossword No 1,894

Across

1. Jungle or desert perhaps, or, say, sea (5)
2. Emir crushed accuser of public officials (9)
3. Novel on theist, loner for gay nature [Enumeration error: this should be 7/3/3/3/4/5] (10,6,9)
4. Wild thing and feathered friend, both unheralded, coming from the sunrise (7)
5. Insufficient time to fly back for flock (5)
6. Near the sole submissive (9)
7. Taco place serving agent of the monopoly on violence (3)
8. Eagle maybe through nesting in a rocky outcrop (7)
9. Reward taken back, prompting cry from setter (3)
10. So many fish circling Mallimack: tons, look! (9)
11. Oddly lacking gumption, left behind master thief (5)
12. See 11
13. Apprehend Greek (7)
14. Noise of one revolution's convulsions demonstrates sound science (9)
15. See 11

Down

1. Secret message with answer and detailed marks of what's wrong and what's right (8)
2. Non-amorous character in opera (6)
3. It is *peak* composer (4)
4. Is boring manuscript a failure? (4)
5. Events for perfunctory lovers propped up singular low places (5,5)
6. In audition, Wicked singer plumbing the depths (4)
7. The agreement containing right year for lament (8)
8. See 11a
9. Thing in the middle of shellfish! (5)
10. Nature is sly: I, spending time and energy, arranged wee test (10)
11. "Of the Country": introductory notes from Reverend Upton reviewing agricultural life (5)
12. The golden ratio's a piece of scripture (8)
13. Walls of tartlet and canape falling apart: get meat (8)
14. That half-crushed, cracking pile-up of vehicles suggests computer-assisted routefinding (6)
15. Exercise skirt stuck on waistline (6)
16. They firstly tumbled in traps leading to lair (4)
17. Should, after pee, two thirds drop off? Wow (4)
18. Fall endlessly to pieces after a codeword from NATO (4)