Sigma follower
I think it could be either:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sigma follower</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 chi that I've seen before include "Mental projection" , "Greek X" , "One character abroad" , "Greek character" , "Twenty-second Greek letter" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sigma follower</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 tau that I've seen before include "Greek letter; cross" , "letter from foreigner" , "A subatomic particle" , "character from Athens" , "19th letter of the Greek alphabet" .)