Become level (4,3)
I believe the answer is:
even out
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">become level</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for even out that I've seen before include "Spread equally" , "Make level" , "Make flat" , "reach consistent level" , "Smooth" .)