Effortlessly (6)
I believe the answer is:
easily
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">effortlessly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for easily that I've seen before include "With little difficulty" , "Simply" , "without doubt" , "with little effort" , "Effortlessly" .)