Cryptic crossword No 2,201

Across

1. I hear church organ playing, lacking good singer (8,4)
2. Clever to reduce Brian's weight by half (6)
3. Let dog run around but don't allow to go out (6)
4. An unstudied outdoor space, an outdoor space and a president (8)
5. Girl (in sitcom?) takes time out from jokes (4)
6. Rehearsals assist in getting to grips with Latin dance (5)
7. State level movement linked to the moon (4)
8. See 1
9. Uncomfortable and shy about rodent in cricket club (8)
10. Criminal: "My cava? It bubbles!" (8)
11. Wearing ridiculous disguises where setters get to work (4)
12. Turn back before reaching volcano (4)
13. Scene Arthur's now begun to cut from end of Death of a Salesman, giving inspiration for The Crucible (5)
14. What Juliet's lost when she's stuck in a low? (4)
15. Nouveau riche, he's part of the county set (8)
16. Line in need of poles to display bedding (6)
17. Soul of revolutionary trailing disguised spy (6)
18. Dodgy writers with energy to create rising tension (8)

Down

1. March to war brings peace at last, as a knight appears (5)
2. New USA rips old German state (7)
3. Mashed, ruined — that's it! (2,4)
4. The French lass is fair (5)
5. Drinking establishment to ban a girl (7)
6. Stupid setter with endlessly confused diction (7)
7. Took a trip, oddly athletic and oddly acrobatic (9)
8. 1000 cheaters cheating? Games to be played again (9)
9. Chilly animal thaws, starts getting familiar? (3)
10. Original version of Indian drink consumed by a couple of Charlies (7)
11. A trace found swirling around e.g. St Ives, for the most part (7)
12. Cameron's twisted kind of story (7)
13. Signs of joy when Les Mis put on shuffle  (6)
14. City found where I cut some, I bleed some (5)
15. Banjo, Nessa's holding it for Ruth perhaps? (5)