Answer: scultch

AnswerCrossword Clue
scultchrubbish; refuse
scultchthe stones, old shells, etc., forming an oyster bed and furnishing points of attachment for the spawn of oysters
scultchto prepare (an oyster bed) with culch
scultchthe spawn of oysters
scultchclean trash eg string, paper, also CULCH, CULTCH, SCULCH