Cryptic Quiz

Questions

1. French knight, thank heaven?

2. Divinely amusing Italian poet?

3. Agent of guaranteed investment?

4. Clean graph curve?

5. Lord of the Flies is a devil?

6. South Asia Muslim ruler's title, variously distorted?

7. Physical rate of change of v over time?

8. Cubic substitute ZrO2?

9. Dripping with Yiddish sentimentality?

10. Prepared plural money slang?

11. Supercilium often raised?

12. Sound, hearing, and non-electric musical instruments from the Greeks?

13. Laughing feliform?

14. Biblical hairshirt worn with ashes?

15. Each vowel, correct order, moderate consumer?

16. Mythological Norse 'hall of the slain'?

17. Eponymous 1947 weapon developer?

18. Bass red triangle was the first ever registered (UK)?

19. Extended intranet?

20. Half-baked?