Symbolic device or badge (6)
I believe the answer is:
emblem
I believe this is a double definition.
'symbolic device' is the first definition.
(I've seen this before)
'badge' is the second definition.
(I know that badge is a type of badge)
(Other definitions for emblem that I've seen before include "Typifying symbol" , "Badge or representative device" , "Device, badge or symbol" , "Badge, token" , "Visible symbol of an abstract idea" .)