Cryptic crossword No 3,661

Across

1. Sugar coating element of stern heart (4)
2. Recital I bickered claiming proof of innocence (5)
3. Friendly individual's north heading east around noon (6)
4. Soft king lost queen with cry of help (4)
5. Vanilla regularly is trouble (3)
6. Country caught an American lawyer... (6)
7. ...living across North Dakota becoming crooked (7)
8. Jacket in dresser (6)
9. Leave port in fancy teapots having drunk tequila essentially (3,2,3)
10. Recalled extract from balsams aimed to create odour (6)
11. Extraordinary lead character in Avatar stopped behind the scenes (4)
12. Exhaled out loud in low spirits (4)
13. Right gangster with shank (5)
14. Artist after gold tone (4)
15. Active on a field (4)
16. Expression of cow jumping over this, nearly (3)
17. A third puzzle in by today for my father (8)
18. Face of boy seen in each panorama's far side (7)

Down

1. Overcome 48 hours in speech (4)
2. Uncovered Lord of the Flies lines old and changed (8)
3. Bloody ewe upending shelter (6)
4. Concerns come from disrespectful talk about Mark, of course (7)
5. Stupidly I covered for one who had to sign papers (8)
6. What mothers-in-law, a yapper, do (8)
7. Natively I danced over Britain, obviously (10)
8. Lockets reportedly found south of France from Jones (10)
9. Calm old man meets male writer (6)
10. A sport guy's heartless acknowledgement of offense (7)
11. Cartoonist delivered answer to which joint was hurt (6)
12. Usually no space is cleared out by friend (8)
13. Every third magistracy is dirty (4)
14. Punctual Cambridge university upset at bank opening late (6)