Lodestone, eg (6)
I believe the answer is:
magnet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lodestone eg</span>' is the definition.<br/ ><span class="explanation-format__explanation">(lodestone is a kind of magnet)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for magnet that I've seen before include "Focus of attraction" , "Great attraction" , "Attractive body" , "what's attractive" , "Attractive piece of metal" .)