Possible Clues:

• Do something different - indicate editorial interference?
• Vary the ways of doing something
• Campanologists will vary the order of performance
• Greens hatching plot to create new order
• Start to do things differently as belfry team must?
• Vary the order and circle the differences
• Repeat in varying order in the bell-tower?
• At a towering height, everyone soundly roped together to achieve this, and make a new start?
• What 9 do to inject a little variety