-- Trotsky (4)
I believe the answer is:
leon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">trotsky</span>' is the definition.<br/ ><span class="explanation-format__explanation">(Russian revolutionary Leon Trotsky)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for leon that I've seen before include "- Trotsky, communist" , "Put up Chrissie" .)