Related Clues:

• Plan impediment
• Trip up
• Fishing-line problem
• Hidden hindrance
• Become entangled
• Unforeseen glitch
• Hangup
• It might produce a run
• Pulled thread
• Glitch or hitch
• Capture the interest of, in slang
• Catch, as one's attention
• Really impress, slangily
• Take eagerly
• Reason to say 'Now what do we do?'