Oil vessel (5)
I believe the answer is:
cruet
'oil vessel' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cruet that I've seen before include "Container for table condiment" , "Truce over container for table" , "Small container for salt or pepper" , "it stands on the dinner table" , "Small container for seasoning or relish at table" .)