Customs and conventions (5)
I believe the answer is:
mores
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">customs and conventions</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 mores that I've seen before include "Conventional values" , "Customs and conventions of society" , "Society's customs" , "(Society's) conventions" , "codes" .)