Sorrow over (7)
I believe the answer is:
deplore
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sorrow over</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 deplore that I've seen before include "Bemoan" , "Express disgust at" , "Regret deeply and strongly disapprove" , "Regret, censure" , "Sorrow over" .)