I say, look at me — so disreputable (5)
I believe the answer is:
seamy
'disreputable' is the definition.
(similar in meaning)
I cannot understand how the rest of the clue works.
(Other definitions for seamy that I've seen before include "Disreputable (side)" , "Sordid, disreputable" , "Squalid" , "Marked with joins; disreputable" , "Sleazy, sordid" .)