She has a part in Victorian nativity (4)
I believe the answer is:
anna
'she' is the definition.
(I've seen this before)
'a part in victorian nativity' is the wordplay.
'a part in' says the answer is hidden in the clue.
'ANNA' is hidden in the letters of 'victorian nativity'.
'has' is the link.
(Other definitions for anna that I've seen before include "The name's the same,either way" , "___ Pavlova, Russian dancer, d. 1931" , "Unit of length" , "copper, once, in India" , "- - and the King of 22" .)