Related Clues:

• It might produce a run
• Pulled thread
• Glitch or hitch
• Something in the way
• Reason to say 'Now what do we do?'
• Minor problem
• Hurdle
• Bump in the road
• Grab onto
• Sweater flaw
• Negotiations delay
• Unforeseen complication
• Schedule spoiler
• It's 'catchy'
• Nylon woe