Tartan representation (4)
I believe the answer is:
clan
'tartan representation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for clan that I've seen before include "Large family forming close group, big in Scotland" , "Group of families with common ancestor" , "Kinship group" , "Scottish family grouping" , "Highland grouping" .)