Amputate (5)
I believe the answer is:
sever
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">amputate</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sever that I've seen before include "Divorce" , "split" , "Cut completely" , "Cleave" , "Divide by cutting" .)