Lacking in quantity (6)
I believe the answer is:
meagre
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lacking in quantity</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 meagre that I've seen before include "Thin -- inadequate" , "skinny" , "little" , "'Stingy, skimpy (6)'" , "Scant" .)