Delay or hold back (6)
I believe the answer is:
detain
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">delay</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that delay is a is a more specific form of the action of delay)</span><br/ ><br/ >'<span class="explanation-format__original">hold back</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for detain that I've seen before include "Hold (someone) back" , "Keep waiting or under restraint" , "Delay or take into custody" , "Hold back or keep under restraint" , "Sing to (someone)" .)