"For starters..." (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">for starters</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Another definition for firstly that I've seen is " Primarily".)
(Other definitions for first that I've seen before include "best" , "The one that precedes all others, in time say" , "higher than the others" , "Leading" , "Most important" .)