Kept in custody (4)
I believe the answer is:
held
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">kept in custody</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for held that I've seen before include "Clasped" , "Detained" , "Retained, kept" , "Retained; grasped" , "Grasped, carried" .)