Crossword Genius

"__ and Old Lace" (7)

Ross

I believe the answer is:

(Other definitions for arsenic that I've seen before include "Brittle grey-green semi-metal, atomic number 33" , "Powerful poison" , "Poison found in races" , "Ratsbane" , "Element No 33" .)

I've seen this clue in the LA Times.
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