Let raven free in wind from the east (8)
I believe the answer is:
levanter
'wind from the east' is the definition.
(type of Mediterranean wind)
'let raven free' is the wordplay.
'free' is an anagram indicator.
'let'+'raven'='letraven'
'letraven' anagrammed gives 'LEVANTER'.
'in' is the link.
(Other definitions for levanter that I've seen before include "Strong East Mediterranean wind - relevant (anag)" , "One who bunks off" .)