One dozen (6)
I believe the answer is:
twelve
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one dozen</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for twelve that I've seen before include "Three fours" , "Last hour" , "Midday" , "houses in a year?" , "[MIDNIGHT], perhaps" .)