Space cloud (6)
I believe the answer is:
nebula
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">space cloud</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 nebula that I've seen before include "Unable to find patch in the sky" , "Unable to be like a distant galaxy" , "Misty appearance in the heavens" , "Interstellar gas cloud" , "Mass of interstellar gas" .)