Names as a source
I believe the answer is:
cites
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">names as a source</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cites that I've seen before include "Quotes as authority" , "Mentions as an example" , "Quotes; mentions in official despatch" , "Quotes; names" , "Refers to" .)