One of two US presidents (9)
I believe the answer is:
roosevelt
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one of two us presidents</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for roosevelt that I've seen before include "32nd US president, Franklin" , "Old president" , "Long-term leader" , "Teddy" , "Surname of 26th and 32nd US presidents" .)