Set of twelve (5)
I believe the answer is:
dozen
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set of twelve</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 dozen that I've seen before include "A number of disciples" , "Group of 12" , "Group of twelve" , "Set of twelve" , "A small number" .)