Sordid, disreputable (5)
I believe the answer is:
seamy
I believe this clue is a double definition.
'sordid' is the first definition.
(I know that sordid can be written as seamy)
'disreputable' is the second definition.
(similar in meaning)
(Other definitions for seamy that I've seen before include "Marked with joins; disreputable" , "Disreputable (side)" , "Squalid" , "Sleazy, sordid" , "Sordid, disreputable" .)