Of Swiss peaks (6)
I believe the answer is:
alpine
'of swiss peaks' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alpine that I've seen before include "Plant of high mountains" , "Relating to a European mountain range" , "seen in rocky state?" , "from Germany, Austria etc" , "Nepali (anag.)" .)