Bern-born (5)
I believe the answer is:
swiss
'bern-born' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for swiss that I've seen before include "like Federer" , "Zurich native" , "-- Cheese plant; -- roll" , "Nationality of Carl Jung" , "Relating to Switzerland" .)