Postpones (6)
I believe the answer is:
delays
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">postpones</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 delays that I've seen before include "Slows down, procrastinates" , "Stays or postponements" , "Procrastinations or postponements" , "Stoppages" , "Hinders, makes late" .)