Crossword Genius

IT-based design with not a word about one reactor element (7)

Ross

I believe the answer is:

cadmium

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'element' is the definition.
(cadmium is a kind of element)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for cadmium that I've seen before include "Potentially dangerous element" , "A yellow" , "reactor component" , "Soft bluish-white metallic element" , "Metal resembling zinc" .)

I've seen this clue in The Independent.
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