Get realistic (4,4,2,5)
I believe the answer is:
come down to earth
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">get realistic</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 come down to earth that I've seen before include "Astronauts must eventually" , "face reality" , "stop fantasising" .)