Bit part actor from stage, embodying Christ (5)
I believe the answer is:
extra
'bit part actor' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for extra that I've seen before include "Additional - bye" , "person in shot?" , "Bit actor in film" , "Bit actor in crowd scene" , "late edition" .)