Day divider (4)
I believe the answer is:
noon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">day divider</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 noon that I've seen before include "Twelve o'clock in the day" , "Twelve during daylight" , "Twelve o'clock, midday" , "12 pm" , "The middle of the day" .)