Tricky Mother's Day Crossword

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Across
  1. 3. The almond paste used to form the eleven apostolic balls atop a traditional Mothering Sunday cake.
  2. 9. Pioneering Cornish engineer who built the 'Puffing Devil' steam locomotive.
  3. 11. Cryptic: Rodent's entrance found near Penzance? (A famously festive fishing village).
  4. 13. Cryptic: Spring bloom: 'faded, old, I' violently mixed together.
  5. 14. North Cornish parish, and the middle name of a former Prime Minister's daughter born in the county.
  6. 16. A dark magical object, like Slytherin's locket or Ravenclaw's diadem, concealing a soul fragment.
  7. 17. Miss Hardbroom's first name in 'The Worst Witch' (also the Greek goddess of magic).
  8. 19. The secret, jewel-thief alter-ego of Ben's cabbage-smelling Granny in David Walliams' book.
  9. 20. Ruined North Coast castle heavily steeped in Arthurian legend.
Down
  1. 1. Cryptic: Spoil mother? Father comes first, followed by Member of Parliament and the late Queen.
  2. 2. Cryptic: Our Celtic homeland discovered in broken 'wok near'.
  3. 4. Cryptic: Mother, perhaps, pays for accommodation after father.
  4. 5. Lyra Belacqua's golden, compass-like truth-telling device in Philip Pullman's trilogy.
  5. 6. In A.F. Steadman's 'Skandar' series, these aren't sparkly and sweet, but bloodthirsty, elemental beasts.
  6. 7. Cryptic: Local identity: grain is hot, initially.
  7. 8. Cryptic: Inherited family treasure from male descendant at weaving machine.
  8. 10. The formidable, hammer-throwing headmistress of Crunchem Hall.
  9. 12. Cryptic: Related through the mother: 'male rat' wandering around 'new'.
  10. 15. Cryptic: Mother's Day gift given before being dispatched.
  11. 18. A woman who is the head of a family or tribe.