Atmospheric layer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">atmospheric layer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ozone that I've seen before include "bracing atmosphere" , "Stratospheric layer of gas -- invigorating sea air" , "That precious layer" , "Layer that protects against ultraviolet rays" , "Gas in upper atmosphere" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">atmospheric layer</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stratosphere that I've seen before include "Layer of high air around the earth" , "Part of the air" , "Zone high above earth" , "Region about ten to fifty km above the earth" , "Atmospheric layer" .)