Branch of philosophy (6)
I believe the answer is:
ethics
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">branch of philosophy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ethics that I've seen before include "High standards" , "Codes of practice for businessmen" , "Some philosophy" , "Codes or principles for professional people" , "Codes of standards in business" .)