Doctor Who always just the same (7)
I believe the answer is:
however
'just the same' is the definition.
(thesaurus)
'doctor who always' is the wordplay.
'doctor' is an anagram indicator.
'always' becomes 'ever' ('ever' can be a synonym of 'always').
'who' anagrammed gives 'how'.
'how'+'ever'='HOWEVER'
(Other definitions for however that I've seen before include "still" , "at the same time" , "Nevertheless" , "On the other hand" , "at all events" .)