Alpine form of language (6)
I believe the answer is:
nepali
'language' is the definition.
(Nepali is an example)
'alpine form' is the wordplay.
'form' is an anagram indicator.
'alpine' anagrammed gives 'NEPALI'.
'of' acts as a link.
(Other definitions for nepali that I've seen before include "Native of a mountainous Hindu kingdom" , "Mountain-dweller" , "One from Katmandu" , "Language of Kathmandu" , "Kathmandu native" .)