ACROSS

  7. In twisting back, the shell or nut is found
      To open up to view, by turning round. (6)
  8. Daily grind involving speed with enthusiasm. (6)
  9. The little thing may run or jump. (4)
10. Fiddlers three; and one following. (8)
13. Feedback of sound left injury. (6)
15. The offence meant a year’s absence for the criminal. (5)
16. Volunteer expends little money from chest. (5)
18. Friend invested in gold reserve, getting no reward. (7)
19. Implement having only one handle, to be frank. (5)
21. Birds with 20 like teeth. (5)
23. Mitigate the aftermath of sulphur and eggs. (6)
26. Cheering Asian food around the north and north-east. (8)
28. Instability can bring on the dreaded lurgy at times! (4)
29. Win round with tricks – old king traps ace and jack. (6)
30. Solvent applied on the surface. (6)

DOWN

  1. Expulsion of invaders sounds contemptuous. (6)
  2. Handy resource on endangerment to woodland? (8)
  3. This country’s finally got another name. (5)
  4. Tough Scot heading administrative centre. (5)
  5. To cut right, first draw level. (4)
  6. Grand old weapon, large, has small look. (6)
11. Mouthing untruths not fair, detective began. (7)
12. When returning, one tremendous hug will do! (6)
14. Men who wander she found difficult to catch. (6)
17. Plunge strong? Shorten the field! (4-4)
20. You may or may not fit this description. (6)
22. In the dusk we can hear a short, high-pitched noise. (6)
24. Worked hard, needing time off, relieved of friction. (5)
25. Thin membranes in flipper of seal etc. (5)
27. Betray to those investigating crime
      What gives to some a therapeutic time. (4)