Eminent doctor hiding studies (13)
I believe the answer is:
distinguished
'eminent' is the definition.
('distinguished' can be a synonym of 'eminent')
'doctor hiding studies' is the wordplay.
'doctor' is an anagram indicator.
'hiding'+'studies'='hidingstudies'
'hidingstudies' is an anagram of 'DISTINGUISHED'.
(Other definitions for distinguished that I've seen before include "Noble and dignified in appearance" , "Uniquely recognised" , "like a VIP" , "Differentiated; eminent" , "Acclaimed" .)