Take prisoner (7)
I believe the answer is:
capture
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">take prisoner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for capture that I've seen before include "Take prisoner" , "Take (eg, chess piece)" , "Apprehend" , "Take by force" , "Collar" .)