Possible Clues:

• Energy the old girl used to secure good aid to vision
• Have a look at drink sold by 16 down
• Energy shown by the old tumbler maybe for single viewer
• Watch golf with girl: singular spectacle?
• ... what's prescribed by 16 as gel -- yes, that's unusual
• I heard ultimately charming young woman supplies optical equipment
• English, the old girl carrying good visual aid
• See good girl in monocle
• Watch golf with young woman - that's some spectacle
• Monocle, for example