Complete
00:00:00
7 9 16 17 20 22 1 12 13 2 18 3 10 23 8 11 21 4 14 19 5 15 6
  1. 1 a Bit of an old dinosaur! (6)
  2. 4 a Small plant-sucking insect (5)
  3. 7 a Potential danger (6)
  4. 8 a Ascetic Hindu holy man (6)
  5. 9 a Large seaweed with long, tough stalks (4)
  6. 10 a Surprisingly easy task (8)
  7. 12 a Things that read like 'senile felines' (11)
  8. 17 a Ta! (5,3)
  9. 19 a Svelte (4)
  10. 20 a Positively charged subatomic particle (6)
  11. 21 a Spirited (6)
  12. 22 a Live (5)
  13. 23 a Campanile (6)
  14. 1 d Sudden outburst (5-2)
  15. 2 d Surgical knife (7)
  16. 3 d Improper act (9)
  17. 4 d Wide open (5)
  18. 5 d Supply water (7)
  19. 6 d Habitual drinkers (6)
  20. 11 d Ballyhoo (9)
  21. 13 d Served with ice cream on top or at the side (1,2,4)
  22. 14 d Old breed of powerful smooth-coated animal, often used as guard dogs (7)
  23. 15 d Fast (7)
  24. 16 d Mindless (6)
  25. 18 d Small natural hill (5)

Across

Down