Cryptic crossword No 507

Across

1. On a tight schedule, prepared to lag at check-ins (7,3,5)
2. Flower girl in legend, in legend arranged flowers (7)
3. Western movement resulting from melting pot/stew (3-4)
4. A lasagne I made led to painless condition (9)
5. Kingdom's silver not returned (5)
6. Pray diocese replaces head of abbey in coastal area (7)
7. Country estate mostly made me sneeze (7)
8. Direct note to French head of state (5)
9. Breaking rule again may be a headache (9)
10. Bitter lover at a wedding? (4,3)
11. Drug deliverer is fashionable and healthier (7)
12. Rewriting rant in Aristotle novel (15)

Down

1. Bird barrier (4)
2. Just lead characters in Faust and Iphigenia reformed (4)
3. Match Angola development with European Union backing ... (8)
4. ... and in Strasbourg state civil service principles (6)
5. Haggard character's on timeline with Scottish constituency (8)
6. Give us a clue for cat? (3,3)
7. They may predict a bad camping experience on the radio? (8)
8. Stop-start sleep on road or air transport (8)
9. Old family man loses last of abdominal weight (5)
10. Feather duster? (8)
11. Sweet cake or sweet talk (4-4)
12. Suspend Jimmy for one digital annoyance (8)
13. Join in discussion with senior teacher and stupid man (8)
14. Report lesions discovered on head (5)
15. Forgetful about girl (6)
16. Constituent and journalist in agreement (6)
17. Prostrate boy clutching his heart (4)
18. Peeled fruit struck a chord (4)