Possible Clues:

• Resembling a bulge or swelling
• On lad (anag.)
• Like stationary points on a violin string
• Make careless slip over a line that's knotty
• Was there not a backward boy to sound like Nobby?
• With this a medal would be just for me and Nobby
• Knotty problem with load, starting from mid-morning
• Knobby without the start of 28 across
• No lad flies like a knot
• Why there isn't a medal for me - that's a knotty one!