Cryptic crossword No 2,194

Across

1. Belting one out in choir, joining us for this! (6)
2. Set out on patrols, called boring and heartless (8)
3. Hole in the middle of trunks covering yours truly in photo (8)
4. Maybe of 8 or 23? (6)
5. Worth moving rotten shed (5,3)
6. Scandinavians holding, let's say, regressive ideals (6)
7. Match with 8 and how its side may be categorised? (11)
8. Complain about quantity of future portions (6)
9. Bed wetter decided to strip covers and whistle (8)
10. Fellowship from middle regions, in facing orcs, fled (6)
11. First sign of sunlight to follow after repeatedly taking in Northern Lights (8)
12. Spielberg film's on TV - short moment to rotate dish (8)
13. Take cover of airbed in 19 (3,3)

Down

1. It occurs partially although totally (7)
2. Vegetable in half of crockpot, cooked in rolling boil (8)
3. Pretentious dopes cavorting around university (6)
4. Go crazy with fame - then what? Solve cryptic like this puzzle? (4,2,3,6)
5. Scrap clothes, fight over missing name tags (8)
6. Essentially cryptographic machine obscures - strategic breakthrough at last when cracked  (6)
7. Fellow nearby remains scrubbing backside, gripping edge of size 12 pants? (7)
8. Before now she whacked a little piggy (8)
9. Was he consuming unlimited content, half stoned? (8)
10. Mmm, spectral agents? (7)
11. One round leg, one round pole (7)
12. Ready and waiting, as pillock in quiet carriage might be (2,4)
13. One's tipped to confuse? No thanks! (6)