Bear in the sky (4)
I believe the answer is:
ursa
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bear in the sky</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 ursa that I've seen before include "(and 11 across) Pole Star constellation" , "Major/Minor constellation" , "(& 19 across) Plough constellation" , "and 18 Down: The Great Bear" , "'Major and Minor, constellations (4)'" .)