Answer: tailings

AnswerCrossword Clue
TAILINGSMining residue
TAILINGSMining waste
TAILINGSRefuse from ground ore
TAILINGSResidue, in mining
tailingsTAILING, the refuse part of mined ore
tailingsthe part of a projecting stone or brick tailed or inserted in a wall
tailingsthe residue of any product, as in mining; leavings