Like a space cadet
I believe the answer is:
moony
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">like a space cadet</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 moony that I've seen before include "listless" , "Dreamy" .)