Onetime Argentine leader (5)
I believe the answer is:
peron
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">onetime argentine leader</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for peron that I've seen before include "Former Argentine leader" , "Argentinian dictator, 1946-55" , "Prone to being an Argentine president" , "Argentinian president, Evita his wife" , "Former Argentinian leader" .)