Possible Clues:

• King Arthur's final resting place
• ____ Sunset, released in 1989, was one of Van Morrison’s most successful albums
• King Arthur's paradise
• Place of eternal happiness
• Legendary island, to which King Arthur was taken after his final battle
• Paradise of medieval literature
• Island where Excalibur was made
• In Celtic mythology, an island paradise in the western seas
• Frankie who co-starred in 1965's 'Beach Blanket Bingo'
• 'Why' singer Frankie