Magnanimous aristocrat (5)
I believe the answer is:
noble
I believe this clue is a double definition.
'magnanimous' is the first definition.
(similar in meaning)
'aristocrat' is the second definition.
(I know that noble is a type of aristocrat)
(Other definitions for noble that I've seen before include "Illustrious, peer" , "Stately" , "eg Earl" , "like Basie or Ellington?" , "Of blue blood" .)