Wedding!

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Across
  1. 3. UK city home to the Beatles (9)
  2. 6. English surname sometimes associated with nobility. Also a street in Cardiff Bay (7)
  3. 8. Welsh name meaning “Great Stone” (6)
  4. 9. complete and thorough covering all aspects (13)
  5. 11. Feminine name of Latin origin, popular across Europe but especially Spain (7)
  6. 12. Senator Sanders, Vermont politician (6)
Down
  1. 1. Walled Croatian city on the Adriatic Sea (9)
  2. 2. Water flower (4)
  3. 4. Those who deliver sermons (9)
  4. 5. Cornish seaside town also a famous artist colony (6)
  5. 7. American group with Caleb Followill as lead singer (5,2,4)
  6. 10. Croatian island known for beaches and nightlife (4)