On an even keel (5)
I believe the answer is:
level
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">on an even keel</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 level that I've seen before include "Standard" , "Equal; flat" , "Come clean" , "Floor; horizontal" , "Palindromic storey" .)