Dumbbell, eg (6)
I believe the answer is:
weight
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dumbbell eg</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that dumbbell is a type of weight)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for weight that I've seen before include "Significance" , "Attach importance to" , "The property of heaviness, measure of mass" , "Avoir-du-pois" , "Relative heaviness" .)