Across

• 1. Digesting no fibre creates significant burning. (7)
• 5. Endless depth of top astronaut next to sailing ship. (5)
• 9. Company invested in tube rail? (4)
• 10. Scalp flakes; held, brushed and ruffled. (8)
• 11. Bare skin? Aunty loses point for good looks. (6)
• 12. Amendment of former broadcast. (6)
• 14. Centrism begot self-centrism... (3)
• 15. Canoe adrift in the pacific, say. (5)
• 17. Currency managed to enter football club. (5)
• 19. Regularly run from Foo Fighter (3)
• 21. Spits out fringe joke about manic sect (6)
• 22. Draw back after couple's hearts get higher? (6)
• 24. Declare bug is plaintiff (8)
• 26. Extol desire to lose cents (4)
• 27. Dared to shake snake! (5)
• 28. Quest to synthesise soy dyes. (7)

Down

• 2. Embryo developed without "climax of intimacy" forms gradient (5)
• 3. Conventional equation by computer chip (9)
• 4. Concerning dead stare from overnight flight. (6)
• 6. Pub = atmosphere (approximately). (3)
• 7. Mixture for fans of spice? (7)
• 8. Opening crushed tin with part of rod. (5)
• 11. Personal story of top boys in organisation. (3)
• 13. Roman candles discharge massages (9)
• 16. American sang Christmas songs, changing third verse for jaunty intro from "Sweet Talk". (7)
• 18. Duck backflips dropping kilo of pre-digested food. (3)
• 19. You and I had initially upended a long-standing "normal" (5)
• 20. Bastard used to getting kicked out. (6)
• 23. Show is ever revolving around you. (5)
• 25. Indignation of Ireland's lost estate (3)