Lubricant (3)
'lubricant' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for oil that I've seen before include "eg Olive" , "Lubricant or petroleum" , "Lubricate; fuel" , "Crude" , "Viscous substance for lubrication" .)
'lubricant' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for grease that I've seen before include "'Thick, fatty oil (6)'" , "Musical animal fat?" , "Lubricating agent" , "Musical starring John Travolta and Olivia Newton-John" , "Film with Travolta and Newton-John" .)