Eighth letter in the Greek alphabet (5)
I believe the answer is:
theta
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">eighth letter in the greek alphabet</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 theta that I've seen before include "8th letter of the Greek alphabet" , "letter from abroad" , "Greek letter used in trigonometry" , "Make amends for" , "Greek letter equivalent to th" .)