One of two US presidents (9)
I believe the answer is:
roosevelt
'one of two us presidents' is the definition.
(I've seen this before)
This is the entire clue.
(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" .)