Possible Clues:

• Monocle
• Watch tumbler with a monocle
• Algy sees poorly without one
• Aid to vision
• Watch golf with young woman - that's a solitary spectacle?
• Visual aid as I listened to minimalist composer
• E.g. lens, say, ground without Newton's participation?
• Lens or prosthesis back to front
• Say about the old girl's monocle
• Correct essay about broken leg? Look in the mirror