US President to resolve reforms (9)
I believe the answer is:
roosevelt
'us president' is the definition.
(I've seen this before)
'to resolve reforms' is the wordplay.
'reforms' is an anagram indicator.
'to'+'resolve'='toresolve'
'toresolve' anagrammed gives 'ROOSEVELT'.
(Other definitions for roosevelt that I've seen before include "Leading statesman in war" , "Name of two twentieth century US presidents" , "See president" , "former president" , "32nd US president, Franklin" .)