Crossword Genius

Element with symbol Ra (6)

Ross

I believe the answer is:

radium

'element with symbol ra' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for radium that I've seen before include "Radioactive metal" , "Metallic element discovered by the Curies" , "Curie-found element" , "Radioactive element discovered by the Curies" , "Element with symbol Ra" .)

I've seen this clue in The Guardian.
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