Dirty campaign stuff
I believe the answer is:
mud
'dirty campaign stuff' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mud that I've seen before include "Earth and water mixed" , "Soft wet earth" , "in your eye, it's an affable toast" , "damaging allegations" , "-, -, Glorious - (Flanders and Swann)" .)