Manger (4)
'manger' is the definition.
(both can mean a container for animal food)
This is all the clue.
(Other definitions for crib that I've seen before include "Child's bed - copy" , "Plagiarise - cot" , "Cheat by copying - card game" , "Container for animal fodder" , "Baby's bed" .)
'manger' is the definition.
(I know that manger can be written as trough)
This is the entire clue.
(Other definitions for trough that I've seen before include "Long narrow open receptacle for feeding cattle" , "Container for cattle-feed" , "Hollow between wave crests" , "Feed manger" , "Container from which cattle or horses feed" .)