Possible Clues:

• Durable stocking fabric
• Strong tightly twisted cotton thread
• Fine cotton thread used in stockings
• Man, say, after end of doleful yarn
• Might I sell this with a thread?
• A pound of cotton in water (5)
• Pedestrianised city making fabric
• The thread is fine enough to be made to what I sell
• It's cotton but not rotten so I sell it
• Tough cotton thread