Sordid, disreputable (5)
I believe the answer is:
seamy
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">sordid</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that sordid can be written as seamy)</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 seamy that I've seen before include "Marked with joins; disreputable" , "Disreputable (side)" , "Squalid" , "Sleazy, sordid" , "Sordid, disreputable" .)