Pilfer item from nativity scene (4)
I believe the answer is:
crib
This clue is a double definition.
'pilfer' is the first definition.
(crib can mean to copy or steal from another source)
'item from nativity scene' is the second definition.
(the baby Jesus' crib)
(Other definitions for crib that I've seen before include "Child's bed - copy" , "Plagiarise - Christmas scene" , "model much in evidence at Christmas" , "Infant's bed" , "A model of the manger" .)