Cryptic crossword No 3,834

Across

1. Held back by D or M in variation IX (6)
2. The last character in the revolving point above your head (6)
3. Seed is one of five ending with no ace (6)
4. Exhibit pig in hospital? On the contrary! (4)
5. Showing off young man before party in a very hot place (11)
6. African youth pukes initially during eating disorder (8)
7. Hanging equipment is a problem for Cockney firefighters (6)
8. Block or retrospectively curtail "to curtsy and bow" (8)
9. The language of four ducklings (4)
10. Former crossings of Zulu and eastern supporters (6)
11. Runs into wood to die laughing? (6)
12. At university graduate with skill can be improved (10)
13. Classy woman (possibly a naked one?) loses a 22 (2,4,4)

Down

1. investigation of short and unstable equine railway (7)
2. Englishman found in toilet having sealed instructions from the Pope (4,4)
3. You will only get this this if you have seen it before (4,2)
4. This country was not originally in the middle of Barbados (8)
5. Noted womaniser finds new love with dog, in vain sadly (3,8)
6. Very large and wet, not married, nobody plays with me (7)
7. March 10 is first of the so-called May 19 Coalition? (8)
8. South Africa owns area of Greek city (6)
9. This wool is for country singer only (8)
10. Aluminium, wood or a plant (6)
11. Is superior to former prison accommodation, but there's only one left (6)
12. Language class taking beginners only knowing Yiddish, Romanian, Greek, Yoruba and Zapotec (6)
13. What follows X-ray? Going back I'm scared, arriving at first in New York (6)