Mum's bday crossword

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Across
  1. 2. Longest bone in the leg
  2. 3. Capital of Mongolia
  3. 6. Greek god of the sun
  4. 7. Fourth letter of the Greek alphabet
  5. 8. Queen guitarist Brian May is also an expert in which scientific field
  6. 10. A specific type of structure which has a turret clock
Down
  1. 1. What is a group of pandas known as
  2. 4. Aureolin is a shade of what colour
  3. 5. A deep, broad, ditch either dried or filled with water
  4. 9. Holmes What character have both Robert Downey Jr and Benedict Cumberbatch both played