End a relationship (5,2)
I believe the answer is:
split up
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">end a relationship</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for split up that I've seen before include "Take apart" , "Divorce" , "Parted company" , "Separate" , "Part company" .)