Shady, disreputable (6)
I believe the answer is:
louche
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">shady</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">disreputable</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for louche that I've seen before include "Raffish" , "Appealingly disreputable" , "Questionable or shady, from French" , "Appealingly sordid" , "Disreputable in a rakish sort of way" .)