All there (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">all there</span>' is the definition.<br/ ><span class="explanation-format__explanation">('not all there' can mean insane)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sane that I've seen before include "Rationable, sensible" , "Mentally sound" , "Healthy in mind" , "In full possession of mental faculties" , "Right-minded" .)