Earth orbiter (4)
I believe the answer is:
moon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">earth orbiter</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 moon that I've seen before include "Night light" , "Where Armstrong stood" , "drummer?" , "Expose one's buttocks" , "who headed a religious 29 [CULT]" .)