Cryptic crossword

ACROSS

1. Swarms over its fens like this (7)

5. Use a bike to sell drugs, one is told (5)

8. The Brits, upset by the French, show their indignation (7)

9. In the wrong grid one must be unyielding (5)

10. A lack of understanding in the place one can’t see (5,4)

12. Admit that, on one’s this, one is unaccompanied (3)

13. Something to discuss when right away from Cancer (5)

17. Make ruthless cutback in vexation (3)

19. The governor will have a go at ruler perhaps (9)

21. A herb, like one vetch, may be timeless (5)

22. Large glasses of spirit make me reckless first and last (7)

24. Substance brewers need, as yet to be mixed (5)

25. Tried to submit a composition to the editor (7)

DOWN

1. Part of the bib mixed around so that one may drink (6)

2. Is not getting through test, which is a weakness (7)

3. A short day when one was in session (3)

4. Removes skin when turning over in slumber (5)

5. Is practising villainy, in the main (9)

6. Setter will disappear and lie so hidden (5)

7. Freight one is putting on board: nothing is missing (6)

11. It is designed to put one off the trend tree adapts to (9)

14. Room for liquor in Bute: try changing it (7)

15. How quietly yacht turns, it being good in parts (6)

16. Is valued, one is told, for having levered it up (6)

18. Heath may produce a rice of a sort (5)

20. A gluttonous feed of Cheddar, say (5)

23. Miss out one of the writings, in short (3)