On end (7)
I believe the answer is:
endways
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">on end</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for endways that I've seen before include "Not side on" , "as a departing bus is seen" , "Lengthwise" , "Turned up" , "Not sideways/lengthways" .)