Type of attaché (8)
I believe the answer is:
cultural
'type of attache' is the definition.
This is all the clue.
(Other definitions for cultural that I've seen before include "Artistic" , "Relating to shared knowledge and values of a society" , "Relating to the arts and customs" , "Relating to a society's shared knowledge and values" , "Relating to the arts or society in general" .)