Lamp oil (8)
I believe the answer is:
kerosene
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lamp oil</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for kerosene that I've seen before include "Sore knee (anag.)" , "Paraffin oil (E, not I)" , "Combustible" , "No seeker for American fuel oil" , "Oil used as fuel in lamps and heaters" .)