Doctor with a degree in theatre studies (5)
I believe the answer is:
drama
'theatre studies' is the definition.
(I've seen this before)
'doctor with a degree' is the wordplay.
'doctor' becomes 'Dr' (abbreviation).
'with' is a charade indicator (letters next to each other).
'degree' becomes 'ma' (Master of Arts is a type of degree).
'dr'+'a'+'ma'='DRAMA'
'in' acts as a link.
(Other definitions for drama that I've seen before include "Literary play" , "Plays as branch of literature" , "Play - crisis" , "interesting spectacles?" , "High emotion" .)