Cunningly (8)
I believe the answer is:
craftily
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cunningly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for craftily that I've seen before include "In a cunning way" , "Cunningly, deceitfully" .)