Like Swiss mountains (6)
I believe the answer is:
alpine
'like swiss mountains' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for alpine that I've seen before include "Relating to high mountains" , "To do with great European mountains" , "Native growing up in mountainous area" , "Nepali (anag.)" , "Plant of high mountains" .)