Banality (6)
I believe the answer is:
truism
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">banality</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for truism that I've seen before include "Saying that's obviously accurate" , "Unoriginal and obviously correct statement" , "Obviously correct and verified statement" , "self-evident statement" , "An obvious statement that says noting new or interesting" .)