Ethical (5)
I believe the answer is:
moral
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ethical</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for moral that I've seen before include "Concerned with principles of right and wrong" , "ethical standard" , "Relating to good and evil" , "Practical lesson to be drawn from an experience" , "Righteous" .)