Answer:

arsenic

AnswerCrossword Clue
ARSENIC"Old Lace" companion
ARSENICKiller in a Kesselring play
ARSENICAbby and Martha's poison of choice, in a 1939 play
ARSENICPesticide ingredient
ARSENIC".. and Old Lace"
ARSENICPoison in some whodunits
ARSENICElement in insecticides
ARSENICInsecticide poison
ARSENIC"... and Old Lace"
ARSENICPoison used in a play
ARSENICOne of two elements that ends with the letter C
ARSENICKiller in some murder mysteries
ARSENICPoisonous element that flavors a sauce in "You're a Mean One, Mr. Grinch"
ARSENICPoison in some mysteries
ARSENICLethal additive to elderberry wine, in a Kesselring black comedy
ARSENICMurder mystery element?
ARSENICAs, on the periodic table
ARSENICPesticide poison
ARSENICWhodunit poison
ARSENICAs, in the lab
ARSENICAs, in formulas
ARSENICToxicology concern
ARSENICPoisonous element
ARSENICInsecticide ingredient
ARSENIC"... and Old Lace" (Joseph Kesselring play)
ARSENICWhat lewisite contains.
ARSENIC... and Old Lace.
ARSENIC"... and Old Lace."
ARSENICRat poison.
ARSENICFound in Paris green.
ARSENICA poison.
ARSENICStrong poison.
ARSENICMedicine or poison.
ARSENICCompanion of "Old Lace."
ARSENICSubject of a Lindsay-Crouse play.
ARSENICPharmacopoeia item.
ARSENICAn element.
ARSENICElement.
ARSENICElement in many a whodunit.
ARSENICMystery-story poison