Sixty seconds (6)
I believe the answer is:
minute
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sixty seconds</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for minute that I've seen before include "Very small, like unit of time" , "Short period of time" , "Sixty seconds" , "Lilliputian" , "60 seconds; tiny" .)