Predominantly (6)
I believe the answer is:
mostly
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">predominantly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that predominantly can be written as mostly)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mostly that I've seen before include "Largely" , "In large part" , "More often than not" , "On the whole" , "In the main, nearly all" .)