Possible Clues:

• Turn up motorway to old-fashioned roadblock
• A stand-off or deadlock
• Deadlock, stand-off
• Sounds as if the mischievous fool caused the deadlock
• Showing no emotion, four left, leaving deadlock
• I am no longer trendy as a result of deadlock
• 'Deadlock, stalemate (7)'
• Situation in which progress is impossible
• I'm old-fashioned, but I must turn round here
• No progress is possible in this type of situation