Cryptic crossword No 3,845

Across

1. Stasi moving in to capture sci-fi writer (6)
2. Pest spray can in use (8)
3. Twelve 16d in deadly earnest (4)
4. Article returned with bill - wrong date and very short time! (10)
5. Captivating joint report not current. Wrong generic frontispiece! (11)
6. Occasionally without magical stick. Another time! (3,3,4)
7. Power with basic drive is corrosive agent (4)
8. Disgrace of late heir historically lacking substance (8)
9. Celestial wanderer's marked path in physical training (6)
10. Train turned loose almost all around Switzerland (6)
11. Unresponsive klutz circumnavigating outer space (6)
12. Protection of member with mutual ownership (6)
13. Mean pain, yes? (6)

Down

1. Ladybird flies around boulevard hereafter (6)
2. Simply put in seed storehouse (2,1,8)
3. Indications of acceptance put on over damages (8)
4. Almost colliding with young woman (4,4)
5. Fifty-one pounds easily spent (6)
6. Almost new, ahead of schedule (6)
7. Greek character and Englishman make extremely energetic waves (5,3)
8. Lee's pics ruined by dwarfs (8)
9. Form pouch and fill with ink, beginning to make composite picture (6)
10. Church flooded by leak - it's a sign! (6)
11. Ammo snatches occurring intermittently, every four weeks or so (6)
12. Wicked jerk making acid (6)
13. Big city copper occasionally near finding something missing (6)