Creativity encapsulated by senior European intellectual (6)
I believe the answer is:
sartre
'intellectual' is the definition.
(I know that Sartre has the occupation intellectual)
'creativity encapsulated by senior european' is the wordplay.
'creativity' becomes 'art' (creative work).
'encapsulated by' indicates putting letters inside (I've seen this in other clues).
'senior' becomes 'sr' (similar in meaning).
'european' becomes 'E' (abbreviation e.g. EU).
'art' placed into 'sr' is 'sartr'.
'sartr'+'e'='SARTRE'
(Other definitions for sartre that I've seen before include "Jean Paul . . ., French existentialist writer" , "Jean Paul -, French author" , "Jean-Paul --, French author and philosopher" , "French existentialist philosopher and writer" , "Jean-Paul -, French philosopher/author" .)