Prevent from breathing (5)
I believe the answer is:
choke
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">prevent from breathing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for choke that I've seen before include "Prevent from getting air" , "Have difficulty breathing" , "Become speechless (with emotion)" , "Throttle" , "Prevent from breathing" .)