Side effect (2-7)
I believe the answer is:
by-product
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">side effect</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for by-product that I've seen before include "Spin-off" , "Incidental result of manufacture" , "Unintended side-effect" , "Chance result" , "Side effect" .)