Sleep time (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sleep time</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 siesta that I've seen before include "Afternoon nap in Cadiz" , "PM snoozing?" , "Spanish afternoon activity" , "Catnap" , "Afternoon sleep" .)