Beam of light inside gateway in picture (9)
I believe the answer is:
portrayal
'picture' is the definition.
(portrayal is a kind of picture)
'beam of light inside gateway' is the wordplay.
'beam of light' becomes 'ray' ('ray' can be a synonym of 'beam of light').
'inside' is an insertion indicator.
'gateway' becomes 'portal' (I've seen this before).
'ray' put within 'portal' is 'PORTRAYAL'.
'in' acts as a link.
(Other definitions for portrayal that I've seen before include "painting" , "Picture or description of royal prat" , "drawing" , "Representation" , "Depicting characters" .)