Fatty acid compound (6)
I believe the answer is:
oleate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fatty acid compound</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 oleate that I've seen before include "Ole! Eat up with kind of salt" , "Preparation of vegetable oil" .)