More nuts
I think it could be either:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">more nuts</span>' is the definition.<br/ ><span class="explanation-format__explanation">('loony' can be a synonym of 'nuts')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Another definition for loonier that I've seen is " Dafter".)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">more nuts</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 insaner that I've seen before include "Even more mad" , "Not so reasonable" , "Not so sensible" , "even more senseless" .)