Ethereal (4)
I believe the answer is:
airy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ethereal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that ethereal can be written as airy)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for airy that I've seen before include "Spacious; delicate" , "Fanciful" , "Light, delicate" , "Light and spacious" , "Delicate, casual" .)