Related Clues:

• Combine to form sound barrier
• Look in British Columbia for powerful alliance
• Group of countries in Arab locality
• League leaders in bowls lose Open champion
• Starts off building line of command in multinational group
• Ballot regularly discounted before Conservative coalition
• Allied voters
• Federation has no arena in Barcelona
• Political group to obstruct sound
• Collaborative coalition
• Set cut off on ship in coastal region
• Allied nations
• Protocol book holding up, briefly and audibly, an obstruction to progress for the allies
• League of nations
• Black Caucus, e.g