Roman emperor after Claudius (4)
I believe the answer is:
nero
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">roman emperor after claudius</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nero that I've seen before include "Barbarous Roman emperor" , "Roman emperor infamous for his cruelty" , "Emperor said to have fiddled as Rome burned" , "Emperor said to have started the fire that destroyed Rome" , "Roman tyrant" .)