Across:
   1. Dunderhead's film absence... in lieu, seconds appearing (8)
   5. Inclined to have deed polls reversed, after duplicated letters rejected (6)
  10. Damaged ball 18, now ruined (5)
  11. Beating was frightfully good - by nil! (9)
  12. Mostly bad flush, frightfully withdrawn  (7)
  13. System: bar goods entering (7)
  14. Frightfully bad? (8)
  16. Provokes removal of new balls (5)
  19. Frightfully bad? (5)
  21. Frightfully good? (8)
  24. Frightfully good? (7)
  26. Ford set out to achieve a thaw (7)
  27. Frightfully addresses, then tears off  (9)
  28. Grow and cut down, so they say (5)
  29. Harvests slide frightfully after your first (6)
  30. After May's first outing, they come back the same, and they mean the same (8)
Down:
   1. Providing him bib... easiest with drink (6)
   2. Confusion of blokes finding hotel in support of library (9)
   3. Perhaps pine for nice change (7)
   4. Slander in periodical I believed (5)
   6. Frightfully bad, ugly animal (7)
   7. About 60% of porridge cooked in advance (5)
   8. Frightfully good having hospital function as animal accommodation (8)
   9. Grandpa perhaps said to abstain (8)
  15. Smashed top of tall tree ... frightfully bad outside! (8)
  17. Main toys I played with caused ill feeling (9)
  18. With TV, can lay about not really paying attention (8)
  20. Rode lap frantically with frightfully fast beast (7)
  22. Suggest turning on barbeque (7)
  23. Pressure on second lock  (6)
  25. Free Riesling offer is worrying (5)
  26. Ultimately bad, you having animal accommodation that is so dirty (5)