Answer: BLUEPENCIL

AnswerCrossword Clue
BLUEPENCILMark through, to editors
BLUEPENCILCorrect spelling, e.g.
BLUEPENCILRevise writing
BLUEPENCILAlter a manuscript, e.g.
BLUEPENCILEdit
BLUEPENCILImplement for frustrating writers.
BLUEPENCILRedact
BLUEPENCILRevise a manuscript, e.g.
BLUEPENCILEditor's tool
BLUEPENCILSource of smut?