Sees Latin translation as vitally important (9)
I believe the answer is:
essential
'vitally important' is the definition.
(I've seen this before)
'sees latin translation' is the wordplay.
'translation' indicates anagramming the letters.
'sees'+'latin'='seeslatin'
'seeslatin' anagrammed gives 'ESSENTIAL'.
'as' acts as a link.
(Other definitions for essential that I've seen before include "must-have item" , "Vitally important" , "So is certain oil-production" , "Crucial" , "something necessary" .)