Not achieving maximum productivity (11)
I believe the answer is:
inefficient
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not achieving maximum productivity</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 inefficient that I've seen before include "Failing to make the best use of time or resources" , "lacking competence" , "Not achieving maximum productivity" , "Achieving low productivity" .)