Element below neon on the periodic table
I believe the answer is:
argon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">element below neon on the periodic table</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for argon that I've seen before include "Gas, 1% of atmosphere" , "Organ (anag.)" , "Noble gas used in light bulbs" , "An insert gas to groan about" , "Noble gas, Ar" .)