Copy a child’s bed (4)
I believe the answer is:
crib
I believe this clue is a double definition.
'copy' is the first definition.
(crib can mean to copy from another source)
'a child's bed' is the second definition.
(bed for a baby or young child)
(Other definitions for crib that I've seen before include "Infant's bed" , "Nativity scene; copy illicitly" , "Manger; cheat by copying" , "24 ac" , "Cheat by copying - card game" .)