Cryptic crossword No 4,073

Across

1. What the crew of the Argo want for covering the Chrysomallos? (6,6)
2. A bill to bring things up to the same standard will suffice (8)
3. Old flame out to frustrate. That's rough (8)
4. Overtly strict boundaries to exercises (6)
5. Traders satisfied purchasing boat full of live cargo (6)
6. Desserts are served at the back end of the weekend, I'm told (7)
7. A noble thing when there's noone heartless around (4)
8. Where people used to hang around in York? (5,6,4)
9. Swear when cereal is hot (4)
10. Pretty box for a dunce's cap worn by an idiot (7)
11. See 17a
12. See 8a
13. Ruler gives order for bullfighter to be sacked around November (8)
14. Transport PC Aardan in this (5,3)
15. Nearly all, nearly all, nearly (6)

Down

1. Our intentions are for post to shift south (4)
2. Catalonian oil worker buried in vanadium iron (4)
3. They hold weapons (4)
4. Shopping street in York where Fats goes crazy (8)
5. Trimmed privet border (4)
6. To a degree, painter goes south, not east (2,4)
7. See 17a
8. Doctors cure none in denial (8)
9. Yorkshire banker will slowly bleed from the ear (4)
10. Somewhere to sit and tarry awhile (6)
11. Kevin's in no good shape to begin college (5)
12. Jaspreet takes a wild ride! (5)
13. Get this and we can be friends (5)
14. Small amount passed during Spooner's constipated episode! (8)
15. How Henry Higgins would prefer 6d to be pronounced? You wouldn't bet against it (3,5)
16. "King Takes Mistress".... we're in a dark place now! (6)
17. Two boys back to back across the Ouse (6)