Hold in custody (6)
I believe the answer is:
detain
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hold 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 detain that I've seen before include "Confine" , "Sing to (someone)" , "Hold in detention" , "Keep in custody; hold back" , "Keep waiting or in confinement" .)