Rued (9)
I believe the answer is:
regretted
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rued</span>' is the definition.<br/ ><span class="explanation-format__explanation">('regret' can be a synonym of 'rue')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for regretted that I've seen before include "Lamented" , "Felt remorse for" , "Felt sorry" , "Rued" , "Felt contrite about" .)