Cryptic crossword

ACROSS

1. Sort of course to squeeze between two others (8)

4. Six deliveries and more (4)

8. If ball is struck high it will return in a parabola (3)

9. Flat stone skipping like a Viking ship of war (5)

10. I’m right ahead and get the edge (3)

11. Crumpled as creed might appear (7)

12. Sort of green tooth topping (5)

13. Moral map is quietly compiled with a word in the wrong place (11)

17. Feather of dart left out for match (5)

18. Such the word that’s down on paper (7)

20. Be obliged to pay nothing, you and I (3)

21. Two under a military standard (5)

22. Aspire to taking it back from Miami (3)

23. A tax on what one ought to do (4)

24. It’s many detectives who line port like this (8)

DOWN

1. It may comfort one thus to add spirit to one’s drink (6)

2. Could have been high-born for six shillings and eightpence (5)

3. Sort of white beet can be had with credit (5)

5. Our visa is made up of different types (7)

6. On which one is held to be a person in the red (6)

7. With ability to discern pet vice rep is involved in (10)

9. Stand idle round beginning of month when it’s taken to bits (10)

14. Men who replace us in a month make it larger (7)

15. Bear the expense for dyke-builder put up on the road (6)

16. Creature turns up in Bedlam, inarticulate (6)

18. Cart now adapted to carry silver (5)

19. A vagrant starts tackling the racket (5)