Clan identifier (6)

I believe the answer is:

tartan

'clan identifier' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for tartan that I've seen before include "Symbol of the Scottish clans." , "Scots material" , "Clan fabric" , "Criss-cross pattern" , "Scots patterned cloth" .)

I've seen this clue in The Wall Street Journal.

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