Not gross (3)
I believe the answer is:
net
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not gross</span>' is the definition.<br/ ><span class="explanation-format__explanation">('net' is the opposite to 'gross')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for net that I've seen before include "difficulty" , "Catch; fine fabric" , "Tennis equipment" , "Mesh for the bottom line?" , "Mesh; entrap" .)