Comparison word
I believe the answer is:
than
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">comparison word</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for than that I've seen before include "Compared to" , "appearing in comparison" , "Conjunction; harder - some to define" , "Rather - - (preference)" .)