Thankfulness (9)
I believe the answer is:
gratitude
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">thankfulness</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gratitude that I've seen before include "A sense of indebtedness and thankfulness" , "feeling of obligation" , "Thankfulness and appreciation" , "Feeling of appreciation" , "Thanks" .)