Crossword Genius

Chemical element (8)

Ross

'chemical element' is the definition.
(I know that hydrogen is a type of chemical element)

This is the entire clue.

(Other definitions for hydrogen that I've seen before include "Ubiquitous gas" , "... ditto: symbol H" , "Lightest of all gases" , "The most abundant chemical element in the universe" , "bomb-maker" .)

I've seen this clue in The Telegraph.
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