Complex sentence: Clive continued to be involved in ongoing Parliamentary discussions on company reforms, during which General John Burgoyne, one of Clive's most vocal enemies, pressed the case in 1773 that some of Clive's gains were made at the expense of the Company and the government.
Split into simpler sentences: Clive continued to be involved in ongoing Parliamentary discussions on company reforms. During these, in 1773, General John Burgoyne, one of Clive's most vocal enemies, pressed the case that some of Clive's gains were made at the expense of the Company and the government.