Possible Clues:

• 'Fairy-like, delicate (8)'
• Ecstasy, the true sublime
• 'Delicate, heavenly (8)'
• Is 22 across, in short, the genuine but not the solid thing?
• Interior of planet here, almost unearthly
• Heavenly number with origins in early American lovesongs
• Noble woman about to read pretty nearly — which is heavenly
• Airy, celestial
• Is 'e the genuine article, so thin and all?
• Almost as light as air