Expert from West, unconventional sort (7)
I believe the answer is:
maestro
'expert' is the definition.
(I've seen this before)
'west unconventional sort' is the wordplay.
'west' becomes 'mae' (I've seen this before).
'unconventional' is an anagram indicator.
'sort' with letters rearranged gives 'stro'.
'mae'+'stro'='MAESTRO'
'from' is the link.
(Other definitions for maestro that I've seen before include "Expert in music etc" , "Master of any art, from Italian" , "Top conductor" , "An artist of consummate skill, master" , "Distinguished musician - most are (anag)" .)