Insufficient in amount (6)
I believe the answer is:
scanty
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">insufficient in amount</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 scanty that I've seen before include "brief" , "Lacking in amplitude or quantity" , "Insufficient in quantity" , "Inadequate" , "Of small extent; barely sufficient" .)