Not wobbly (6)
I believe the answer is:
stable
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not wobbly</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 stable that I've seen before include "providing accommodation for Arabs, perhaps" , "Steady in the horse-house" , "Secure - fast - horses" , "'Firmly fixed, not moving (6)'" , "Steady - home for dobbin" .)