Raunchy material (4)
I believe the answer is:
smut
'raunchy material' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for smut that I've seen before include "Indecent items or talk" , "Soot flake or sexual innuendo" , "Soot, dirt, grit" , "Mild obscenity" , "porn?" .)