Cryptic crossword

ACROSS

1. Senior diplomat has a party on money from Japan (5)

4. Tedious state of bedroom needs rectifying (7)

8. Automated greengrocers? They’re a gamble! (5,8)

10. In Virginia is on treetop for the view (5)

11. One is upset about second letter to be blacked by poet (4)

12. Chevelure: it just went to show! (4)

16. Find accommodation for Tudor, for example (5)

17. Writer is into a different form with official backing (13)

19. In all sincerity, is it near being changed in establishment? (7)

20. Saul loses a kiss: is away with a sullen fit (5)

DOWN

1. It’s not the same one I consumed: I can tell them apart (13)

2. They ousted the second person to be inside (3)

3. In part of the church it turns up an oyster (6)

4. There’s craft in donkey’s cry that sounds so metallic (6)

5. Jet process is concerned with single course in race (6)

6. Their notes are heeded by those stepping it out (5-4)

7. Gets wrong end of stick young woman is about to lay hold of (13)

9. Causing cop to err about head of jurors, it will show image (9)

13. Seat of authority sounds as if it’s been cast (6)

14. An acquaintance holds it to be odd but pleasing (6)

15. Settles back? (6)

18. How badly the Italian will accept fifty (3)