Cryptic crossword

ACROSS

1. Dunderhead showing the way to make a boat (4) 8. It’s wrong to hit camel in such torrid conditions (3,7) 9. Starting stroke providing French fries straight from the pan? (4,4) 10. Securely shut up marine animal (4) 12. Transgress, going beyond the limit (6) 14. If going in here a different way, one sees a young cow (6) 15. Be said to be prejudiced (6) 17. Ignore such an area (6) 18. Spirit first put in modern engine – it’s a joke! (4) 19. Made special group have a role to play (3,5) 21. Puzzles cause angry exchanges? (10) 22. Affectation shown by the team (4)

DOWN

2. Its holder presumably has a commanding viewpoint (4,6) 3. One who might well lash out in Parliament? (4) 4. Longed to have the CID sorted out (6) 5. Tightly grip nest of eggs (6) 6. Excellent activity of vandals? (8) 7. A staggering dance? (4) 11. Doing extra for a private purpose (3,2,5) 13. Cooking steak, say, is a simple job (4,4) 16. Repudiate as is getting in at a lower rate (6) 17. Finish work and go to bed (6) 18. John the weightlifter is a card (4) 20. Overtake between mountains (4)