Containing little fat (4)
I believe the answer is:
lean
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">containing little fat</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lean that I've seen before include "Rest against for support" , "Spare - list" , "Spare - incline" , "Unproductive" , "With no fat; slope" .)