In a repugnant manner (7)
(Other definitions for nastily that I've seen before include "Unpleasantly" , "Such is the threatening way" , "in a horrid way" , "In an unpleasant manner" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in a repugnant manner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know this)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for odiously that I've seen before include "in a repulsive way" , "In a repulsive manner" .)