Everyday matters

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Across
  1. 8. old one is upset by head (6)
  2. 10. slender monarch ponders (8)
  3. 11. Boiling angry rabbit eats bread (3,5,3)
  4. 14. educated young woman's shout is not answered (6, 4)
  5. 16. Approving of yub nub, song for Ewok planet (9)
  6. 17. Deceased corvid teeming with maggots. (7)
  7. 18. Anti-Communist spy, weaver of a web of lies (6)
  8. 19. a leg of lamb is a strong fortification (8)
Down
  1. 1. geological formation is the highest form of flattery (7)
  2. 2. partly seated in nervous dining situation (6)
  3. 3. high flyer is part of lab room stickup (10)
  4. 4. dracula with gin cocktail? Sounds like a good sleep (8, 5)
  5. 5. Famous Catherine of Italy finds her remedy in the northeast (8)
  6. 6. undergraduate too hot in south west city (4)
  7. 7. double agent screams at hydrogen (3)
  8. 9. I will defend animals endlessly (8)
  9. 12. Time is in charge over and over again (7)
  10. 13. sausage is made of rocky body parts (9)
  11. 15. A mile begins with small grin (5)
  12. 20. modern day chant to ward off evil, also a taxi (1,1,1,1)