Cryptic crossword No 3,529

Across

1. Chemical company is here in Paris (1,1,1)
2. Immediately correct a course of action (5,4)
3. Reason tight coil captures George (5)
4. Lofty Greek? (5)
5. Gagging when dodgy scone takes toll (9)
6. Approve a sanctimonious beast? (5)
7. Steal fashionable bird (5)
8. Part of circle depicted in charcoal (3)
9. Sister coming and going (3)
10. Abrasive, initially going round insulting those teenage yobs (6)
11. Projectiles found after public school's Head dismissed (6)
12. Delirious when mother returned (3)
13. Excavator a hundred Germans could accommodate (7)
14. I hit Teddy roughly? - it wasn't me! (4,3,2)
15. Old actor, possibly loud, portrays lawman (7)
16. Informed about the dance (2,3,4)

Down

1. 15, fold or food (4)
2. Charge from lithium 66% of objective (4)
3. University bigwigs pickled - that's plain to see (10)
4. Covering nothing in container (4)
5. Alien out of time for 7 of 18 (6)
6. Woodland where 14d's cultivated with hoe (8)
7. Servant produced for audience (4)
8. Pay attention to silent revision (6)
9. President Green? (7)
10. Childless lexicographer found in loo, indelicately (4)
11. Small drunk let off (6)
12. Getting on, about about, getting on (8)
13. Merriment once, too wise, we hear, to be confused with 26 (6)
14. Blade cut noisily (5)
15. Father circling estuary to find brother (5)
16. City securing poor player, by the sound of it (10)
17. Crowd can make a scandal of anything (4)
18. A wicked broadcast collection (7)