Cryptic crossword

ACROSS 8. Black medick: there’s nothing like it! (8) 9. The total assets of the actors’ union (6) 10. An attractive move at football one comes to in trouble (1,6,4) 11. It weighs heavily on the world of fashion (3) 13. Is at the top of the obverse side (5) 15. Is unsettled by the dust bride stirred up (9) 17. Bird going over where amber light flashes (7,8) 19. Note peril involved for one to intrude where not wanted (9) 21. Element with unknown number makes a single whole (5) 23. Information 26 needs for people of a particular sort (3) 24. Is declining to be abandoning one’s beliefs (7,4) 27. First church relic to be put out by a member of the clergy (6) 28. Try pitch out on three painted panels (8)

DOWN 1. Take part in contest when about fifty, but all there (8) 2. It is just the mother of a Frenchman (4) 3. Make one’s chum a sandwich (5) 4. City help in part one might play for Wales (3,12) 5. Feeling it will make an outstanding story (9) 6. On the other hand it needs 11 to do it up (3) 7. A touch of the pen for one man in eight (6) 12. In which doing time for porn is possible (6) 14. Club a motorist might use (6) 16. Everything one needs in the ball for exchange of caresses (9) 18. Make cat hunt top of hedge for a bird (8) 20. Require the French to supply the hype (6) 22. Will go yachting around the North, although its pace is slow (5) 25. It makes a volcanic upheaval at the poker table (4) 26. Test what a judge will do (3)