Lubricant (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lubricant</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oil that I've seen before include "eg Olive" , "Lubricant or petroleum" , "Lubricate; fuel" , "Crude" , "Viscous substance for lubrication" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lubricant</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(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" .)