Answer: tarring

AnswerCrossword Clue
TARRINGFinishing off a roof.
TARRINGRoad crew's task.
TARRINGRoad job
TARRINGBesmirching
TARRINGBlackening
tarringdark, sticky product from coal, wood, etc.
tarringsmoke components
tarringto cover with tar
tarringthe act of tarring