Greek philosopher, a leader on Rhodes TS Eliot translated (9)
I believe the answer is:
aristotle
'greek philosopher' is the definition.
(I've seen this in another clue)
'a leader on rhodes ts eliot translated' is the wordplay.
'leader on' says to take the initial letters (the letter which leads the word).
'translated' indicates an anagram.
The first letter of 'rhodes' is 'r'.
'ts'+'eliot'='tseliot'
'tseliot' with letters rearranged gives 'istotle'.
'a'+'r'+'istotle'='ARISTOTLE'
(Other definitions for aristotle that I've seen before include "noted thinker" , "Realist to be like great Greek philosopher" , "Greek philosopher (Poetics, Politics)" , "Thinking Greek" , "philosophy tutor" .)