Final letter of the Greek alphabet (5)
I believe the answer is:
omega
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">final letter of the greek alphabet</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 omega that I've seen before include "Greek long 'o'" , "Last thing" , "Art of story-telling by body movement" , "Conclusion" , "Greek character symbolizing resistance" .)