Astral (7)
I believe the answer is:
stellar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">astral</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that astral can be written as stellar)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stellar that I've seen before include "Relating to the stars" , "celebrity" , "High-class" , "Outstanding -- star-like" , "Top-notch" .)