Oliver —, Lord Protector (8)
I believe the answer is:
cromwell
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">oliver</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that oliver can be written as Cromwell)</span><br/ ><br/ >'<span class="explanation-format__original">lord protector</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for cromwell that I've seen before include "Lord Protector (sixteen fifty three to sixteen fifty eight)" , "He gave the Irish the choice of going ''to hell or to Connacht''" , "Oliver --, Lord Protector" , "Roundhead leader" , "Old English statesman" .)