Person seizing something (5)
I believe the answer is:
taker
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">person seizing something</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 taker that I've seen before include "Person seizing something" , "He accepts" , "Could be a thief" , "one's prepared to bet" , "Person accepting an offer" .)