Cryptic crossword

ACROSS

1. Not clear how such screen is made to stop tumbler flying (6,5) 8. Public unit carrying shade of meaning above and beyond (8) 9. American backing given to church of that kind (4) 10. Blades inform on others (5)

13. Sounds a little canine, so stop bitch producing litter in reverse (4)

16. A negative from France comes soon (4)

17. In one month in France, ten discovered a style of dress (4) 18. They don’t want what’s been proposed to one’s discomfiture (4)

20. Pile-up caused by dismissal involving first of team (5) 24. It never stops – doesn’t begin, either! (4) 25. Twisting Canada? No: S American water snake (8) 26. They are bound to learn, being crafty (11)

DOWN

2. What oboist needs soundly to study... (4)

3. ...to produce notes, say, in an out-and-out way (5)

4. The ups and downs along the shore nudes are responsible for (5)

5. Like, for instance, to try metal (5)

6. Whisky responsible for an overnight fall in high places (8,3) 7. County feline whose last appearance was a grin (8,3) 11. A service in church to get together (5)

12. Sex appeal with an Italian female: it’s hot in here! (5) 14. Awe may make ‘em quit when not on their home ground (4) 15. The appeal of Oliver was for something extra (4) 19. Opening of a sketch on the journey is a take-off (5)

21. Nine players given up to male part of joint (5)

22. Plants do in the Channel Islands (5)

23. ‘___ more unto the breach, dear friends’ (K Henry V) (4)