As a replacement (7)
I believe the answer is:
instead
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">as a replacement</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for instead that I've seen before include "Stained (anag)" , "Rather - detains (anag)" , "for a change" , "As a substitute" , "In lieu" .)