Ablutionary vessel (4)
I believe the answer is:
ewer
'ablutionary vessel' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ewer that I've seen before include "Large, wide-mouthed jug" , "Large water jug" , "Container" , "Open vessel with handle and spout" , "29 [VESSEL]" .)