Cryptic crossword No 324

Across

1. A sortation of emblems helpfully produces list that starts with A and B (8)
2. C...for 'copy'? (6)
3. Fanny Adams? We hear she has a habit (3)
4. Wolf in ovine attire (3)
5. D is, primarily, in heraldry and Rosicrucianism, the symbol for silver cloth (7)
6. This outfit is avoided by one who is alright, Jack...Jack? (5)
7. 'E put rear in the wrong place and put poo on new kitchen utensil (8)
8. Purifying drug found in family shop (9)
9. 'Right, F off!' Turf out English (4)
10. Echo is a goddess (4)
11. May is spent repairing Marvin Gaye e.p. and the means through which it is heard (9)
12. G? As in George, the writer? After you! (8)
13. All the letters, the first - the last, including H and I (5)
14. Write counter-melody for part of 'The Planets' (7)
15. J loses heart, then head...'You can do it, Juan!' (3)
16. Initially, Special K is for one of the runners (3)
17. Classes L and M welcoming 18 past pupils holding yellow caps (6)
18. Its layers are cut before one tears (8)

Down

1. 'N word' indicating something restricted by one report (8)
2. Games close to 'Lexicon', 'Scrabble', 'Bananagrams' and 'Upwords' containing O and P? No! (9)
3. A range in England or in Italy (9)
4. In London studios, the National Theatre put on 'Hanky Panky' instead of 'A Calling' (9)
5. Ask a stuck-up old writer about morals (5)
6. Donkey sanctuary housing a rabbit that's lost its tail (5)
7. Knight's naked, practically (4)
8. Following Q's retirement, intelligence level of incomplete deal is 'conjecture' (4)
9. Constant RSS issue raised by one's own child? (9)
10. T is the first letter of twilight, twine, twisted... (9)
11. General Electric's earliest UV light-source is an electrolyte core, scintillating (9)
12. 'Tumbledown Ted' returns, clutching souvenir (8)
13. Pages in book festival content (5)
14. Starts to look under rivulets in W Australian rock (5)
15. Ends X and Y? (4)
16. Last letter of series - Z? Same here! (4)