Quick crossword No 466

Across

1. Means of self defence I just invented, following western division of judo (7)
2. Many items to auction (4)
3. Gang leader revealing viewpoint (5)
4. Filled in for angelic kids in art education (7)
5. Inflammation of body cavity, definitely (9)
6. Where your punt may be capsized, it stops you getting wet (3)
7. Astronomer employs alien as assistant for public appearance? (13)
8. Long way back for British fighters, etc? (3)
9. Cracking two bones (5)
10. Fruit entering a stew (9)
11. Plant which emerges from actors' mouths in a crowd? (7)
12. Decent man decapitated spy (4)
13. Use enterprise's capital instead of accounts initially in scope for cost (7)

Down

1. Sibelius and Coulthard, perhaps covering for the low parts (5)
2. It comes to a point in vehicle (3)
3. Smallest juvenile failing to complete nap (9)
4. Gripping murder in Ms Stubbs' region at the back of Whitstable (13)
5. Permit officer to receive note (3)
6. Courtyard losing about six state executives in Rome (9)
7. Canal concealing a coin (5)
8. Organ with glass pipe (4,5)
9. Ugly crone's pot plant (9)
10. Headless one who terrifies nurse, for instance (5)
11. Extension for DOS program includes the Italian 8-bit space game (5)
12. Leave out of vernacular skill (3)
13. Put on inverted show of approval (3)