Possible Clues:

• Coleridge's 'The __ of the Ancient Mariner'
• Coleridge's "The __ of the Ancient Mariner"
• Frozen dew, hoarfrost
• 'The __ of King William': Old English poem
• "The __ of King William": Old English poem
• Frozen coating on trees and grass
• Window coating
• 'The -- of the Ancient Mariner' (Coleridge)
• Dubai dignitary / Winter coat
• Hoar