Very high (6)
I believe the answer is:
alpine
'very high' 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 "To do with great European mountains" , "Plant of high mountains" , "Native growing up in mountainous area" , "from Germany, Austria etc" , "Nepali (anag.)" .)