Positive thing (4)
I believe the answer is:
plus
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">positive thing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(pluses and minuses)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for plus that I've seen before include "The opposite of minus" , "Together with; advantage" , "Positive and not a negative" , "Positive quality" , "Coupled with" .)