Noble title? It's escaped an old philosopher (9)
I believe the answer is:
aristotle
'an old philosopher' is the definition.
'Aristotle' can be an answer for 'philosopher' (Aristotle is an example). I am not certain of the 'an old' bit.
'noble title? it's escaped' is the wordplay.
'noble' becomes 'aristo' (I've seen this before).
'escaped' suggests deleting specific letters.
'title' with 'it' removed is 'tle'.
'aristo'+'tle'='ARISTOTLE'
Can you help me to learn more?
(Other definitions for aristotle that I've seen before include "Greek logician" , "Totaliser for the great Greek philosopher of old" , "Greek philosopher, pupil of Plato, tutor of Alexander the Great" , "Realist to be like great Greek philosopher" , "Philosopher - treats oil (anag)" .)