Seize and take into custody (6)
I believe the answer is:
arrest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">seize and take into custody</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 arrest that I've seen before include "Detain under suspicion of criminal behaviour" , "Land next to the sea" , "Seize and take into custody" , "Sartre (anag) -- check" , "Apprehend; detain" .)