A set (5)
I believe the answer is:
suite
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a set</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that suite is a type of set)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for suite that I've seen before include "Extensive accommodation" , "Three-piece - -" , "Retinue; apartment" , "Adjoining rooms" , "Set of rooms; retinue" .)