Greek character (5)
(Other definitions for ethos that I've seen before include "Characteristic culture of a culture or time" , "moral code" , "Distinctive group attitudes" , "Characteristic attitudes" , "Characteristic standards of those" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">greek character</span>' is the definition.<br/ ><span class="explanation-format__explanation">(letter from the Greek alphabet)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for omega that I've seen before include "end of series" , "Final outcome" , "long letter" , "completes a series" , "16 letter" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">greek character</span>' is the definition.<br/ ><span class="explanation-format__explanation">(letter from the Greek alphabet)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for alpha that I've seen before include "First in order of importance (for a Greek?)" , "Foremost" , "First (class)" , "First, best quality" , "Greek vowel" .)