Cuban leader since 1959 (6)
I believe the answer is:
castro
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cuban leader since 1959</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 castro that I've seen before include "Fidel or Ral" , "Cuban dictator" , "Cuban leader, d. 2016" , "Fidel -, former Cuban leader" , "He's late" .)