Possible Clues:

• Obstruction
• Obstruction case involving rugby player from the scrum and second centre
• Terrible backlog, with backside of employee causing obstruction
• Mason puts down a fair amount of the damage to the logjam
• British rugby player's lifetime obstruction
• Mason puts it down to half the damage from obstruction
• Piece of hair found in cut bread roll and jam
• Obstruction, as in a pipe
• Artery obstruction