Pitch kin (3)
I believe the answer is:
tar
'pitch kin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tar that I've seen before include "Viscous mixture - sailor" , "Kind of rat for sailor" , "Road-dressing for a sailor?" , "Harmful tobacco residue" , "Sticky substance used in road construction" .)