My ideas so far:

A 1st place trophy item with the clan's logo/name either worn on the top of
the head like a crown or held in the hand.

A Guitar worn on the back with the clan's logo/name and their desired colors.

A Hoodie with the clan's logo/name and their desired colors.

A Champion's helmet like from Magic:The Gathering but without the hangy down bits.

An Armband, like the GM armband that has the clan's logo/name and it's desired colors.

References: