Expedite (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">expedite</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that expedite can be written as hasten)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hasten that I've seen before include "race? - with 26a" , "Travel with expedition" , "Speed up" , "Act or move fast" , "dash" .)