Make reference to (4)
I believe the answer is:
cite
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">make reference to</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 cite that I've seen before include "Mention as example or quote" , "Adduce as proof" , "Summons - quote" , "Quote (a reference)" , "Quote or refer to" .)