Small bill (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small bill</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 one that I've seen before include "time" , "Unity" , "United" , "1" , "Hour after midnight" .)