Complex sentence: They were Victorine Canons who were influenced by the Cistercians who emphasised manual labour and self-sufficiency so that the clerks who had taken holy orders worked on the farm, as well as providing clergy for surrounding churches.
Split into simpler sentences: They were Victorine Canons who were influenced by the Cistercians emphasis on manual labour and self-sufficiency. As a result the clerks who had taken holy orders worked on the farm, as well as providing clergy for surrounding churches.