Possible Clues:

• Will your boy catch with more than a dozen lines?
• Spenserian work
• Your boy gets ten back for this fourteen
• Will your boy catch a matter of fourteen, inversely?
• Your man has a net and a number of lines but not for angling
• One of Shakespeare's begins 'Shall I compare thee to a summer's day?'
• Verse form of 14 lines
• Boy given X (upsettingly) for poem
• Shakespearean poetic form
• Your boy, with no more than ten back there, has no more than fourteen by line