In contrast (7)
I believe the answer is:
whereas
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in contrast</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 whereas that I've seen before include "But on the contrary" , "Considering that" , "In contrast with the fact that" , "On the other hand" .)