40th Anniversary fun

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Across
  1. 4. County in tatters worn inside phone (8)
  2. 5. Darken windows before seraphim withholding new beginining for a King's birthplace. (8)
  3. 7. After soft centre first finding fire's opposite for a letter's home. (4,6)
  4. 8. A wizard's retreat is a confused serviceman around the last of grail. (7,4)
  5. 10. Scrambled porridge covering bacon and eggs at first for dramatic crossing. (4,6)
  6. 12. Changing cleats for regal abode (6)
Down
  1. 1. Ocean experience as an Orca's lunch before I cook affaires. (7,6)
  2. 2. Avoid the second half of Orwell classic for lunch location. (4,4)
  3. 3. A boat's left with gales again at first, never capsizing where moored. (4, 7)
  4. 6. Pilots halved scorching dials extremely at cafe. (9)
  5. 9. Cartoon cat laughs before artist gets home (7)
  6. 11. Trudge back to greet ness's first creature (7)