Most importantly (9)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most importantly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(of central importance)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for centrally that I've seen before include "in the middle" , "Chiefly" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most importantly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for above all that I've seen before include "primarily" , "Mainly" , "More than anything else" , "omnipotent?" , "First and foremost" .)
(Another definition for principally that I've seen is " in the main".)