Regret, ruefulness (7)
I believe the answer is:
remorse
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">regret</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(remorse is a feeling of regret)</span><br/ ><br/ >'<span class="explanation-format__original">ruefulness</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that remorse is a type of ruefulness)</span><br/ ><br/ ></span>
(Other definitions for remorse that I've seen before include "Sorrow for wrong committed" , "Regret or sorrow for wrong-doing" , "Sorrow for sin or wrong-doing" , "Pity" , "Distress from a sense of guilt" .)