Part of a larger group (6)
I believe the answer is:
subset
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">part of a larger group</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 subset that I've seen before include "Not all the members" , "Group of which all the elements are contained in a larger group" , "small class?" , "A collection of things forming part of a larger collection" , "Group within a group" .)