Possible Clues:

• One on board closing 15 across
• Awful rubbish! Charlie upset person calling the shots
• Person calling the shots is responsible for 24 across
• The one calling the shots by closing 15 across
• The one calling the shots is bound to make a scene
• Business leader I'd confused with minister
• Supervisor, manager
• Note current clergyman is a member of the board
• One of the most senior managers in a firm
• I had upset minister who runs a business?