Eighty Layers of Owen: A ‘Mine’field of Sweet Reads

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Across
  1. 2. Underground tunnel in a mine (5)
  2. 3. Dessert with layers of meringue and cream (7)
  3. 6. Sweet oat bar with golden syrup (8)
  4. 8. Engine Engine used to pump water (4,6)
  5. 12. Unique identifier for books (4)
  6. 13. Layered dessert with fruit and custard (6)
  7. 15. Thin pancake with sugar and lemon (5)
  8. 16. Card Card needed to borrow books (7,4)
  9. 17. Dessert of fruit with crumbly topping (7)
  10. 19. Book lending period (4)
  11. 21. Sweet treat made from sugar and butter (5)
Down
  1. 1. Person who manages a library (9)
  2. 2. Area where books are stored (6)
  3. 4. Time when a book is due back (4)
  4. 5. Number used to classify books (5)
  5. 7. Place to read and borrow books (7)
  6. 9. Cornish term for a mine (5)
  7. 10. Person who works in a mine (5)
  8. 11. Small cake often served with jam and cream (5)
  9. 13. Metal mined in Cornwall, symbol Sn (3)
  10. 14. Light sponge cake in paper cases (6)
  11. 18. Maiden Female mine worker (3,7)
  12. 20. Mineral-bearing rock (3)