Run off to marry (5)
I believe the answer is:
elope
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">run off to marry</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for elope that I've seen before include "Bolt" , "leave with lover" , "Do a runner" , "Abscond for amorous purposes" , "Run away to get married" .)