Possible Clues:

• What some referees suffer from?
• This gives one insight, in short
• Never long to get a sight of this
• My work the reverse of first class? There's a deficiency of vision
• Not long in sight for my work to start
• Short, by the look of it (6)
• The sight of this starts to make my work short
• How my work starts to make me need glasses
• Lack of insight in my work - first class gone west
• In sight, in short, of my work to start with