Humble quality (7)
I believe the answer is:
modesty
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">humble quality</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for modesty that I've seen before include "Diffidence" , "Freedom from vanity" , "Self-deprecating quality" , "Quality of being unpretentious" , "Unpretentious style" .)