Middle of the day (4)
I believe the answer is:
noon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">middle of the day</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for noon that I've seen before include "Twelve during daylight" , "Twelve o'clock, midday" , "Twelve o'clock in the day" , "when only mad dogs go out?" , "12 o'clock" .)