Picture a man in a doorway (9)
I believe the answer is:
portrayal
'picture' is the definition.
(I know that portrayal is a type of picture)
'a man in a doorway' is the wordplay.
'a man' becomes 'Ray' (Man Ray was a 20th-century artist).
'in' means one lot of letters goes inside another.
'a doorway' becomes 'portal' (synonyms).
'ray' inserted within 'portal' is 'PORTRAYAL'.
(Other definitions for portrayal that I've seen before include "Study" , "drawing" , "Representation" , "Depicting characters" , "Imitation" .)