Galaxy member (4)
I believe the answer is:
star
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">galaxy member</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 star that I've seen before include "Celebrity - heavenly body" , "White blaze on a horse's forehead" , "Symbol of excellence" , "Red Dwarf?" , "Five-pointed figure" .)