Crossword Genius

Liquid nitrogen, for instance (7)

Ross

I believe the answer is:

cryogen

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">liquid nitrogen for instance</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that liquid nitrogen is a type of cryogen)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for cryogen that I've seen before include "One making cold" , "used in freezing mixture" , "Substance used to produce very low temperatures" , "freezer" , "it's freezing stuff" .)

I've seen this clue in The Guardian.
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