Other crossword clues for answer "BLACKMAIL"BLACKMAILMotive for murder, perhapsAlfred Hitchcock's first talkieCoerce illegallyCoerce into compliance by threats.Basis of a case for Perry Mason.Case for Perry Mason.Basis of many a mystery.ExtortSupreme letters (1937-71)Film murder motive, perhapsFilm murder motive, sometimes*Illegal extractions