Cryptic crossword No 3,682

Across

1. Unknown doctor used up scent (11)
2. Observed no end to clerical division (4)
3. Music producer gets one to go after plain artwork first (11)
4. Head honcho’s missus has hard time (4)
5. Old city is found in nautical atlas (5)
6. Artist gets taste of the daily grind (3,4)
7. Egghead removes clothing outside and streaks! (7)
8. In the morning guy gets to capital (5)
9. Here in France Lucy lost heart in a bitter way! (5)
10. Passed by, pleased with changes (7)
11. Vehicle carried ancient marrow back in period of non-violent hostility (4,3)
12. Pause when one plan gets a cold rejection (7)
13. Kind small characters (5)
14. Spaces left out for drinkers (4)
15. Trencher stews hare, bees and cod (11)
16. Sufficient English took control back (4)
17. Competitors produce commercial poems about changes in air (11)
18. Surrounding one doctor with leaders of indigenous eastern native tribes (7)

Down

1. Managed to return to Penny with ointment (4)
2. Bear you and me over river first (4)
3. Expert takes Tube to get finished article (7)
4. Tom and I eat duck and beast from South America (5)
5. Stupid gendarme loses redhead in final chapter (7)
6. Harmful for one to get involved in badly laid out Leeds route (11)
7. Popular supporter gets to test knight and footsoldier (11)
8. American girl group returns with presenter (11)
9. Kick replica around West End (11)
10. Three-part test involves near chaos! (7)
11. Understand about space evolving around one (7)
12. Pre-loved article initially sold to Tyneside wife (2,3)
13. Son has to wait outside for backing track (1,4)
14. Caught crackhead when stupidly halted outside (7)
15. One gets into chemical substances at festivals (7)
16. Annoy first woman behind gym (5)
17. Number hide duck inside (4)
18. Quietly regret getting to Leith! (4)