With proficiency (4)
I believe the answer is:
ably
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">with proficiency</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>
(Other definitions for ably that I've seen before include "Masterfully" , "In capable manner" , "Competently" , "In proficient manner" , "With great skill" .)