Sordidness (6)
I believe the answer is:
sleaze
'sordidness' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sleaze that I've seen before include "Corruption in public life (informal)" , "Immoral behaviour" , "Slimeball" , "Corrupt (political?) behaviour" , "Sordid political behaviour?" .)