Note enclosing an invoice, primarily for Italian wine (7)
I believe the answer is:
chianti
'italian wine' is the definition.
(I've seen this before)
'note enclosing an invoice primarily' is the wordplay.
'note' becomes 'chit' (I've seen this before**).
'enclosing' means one lot of letters goes inside another.
'primarily' suggests taking the first letters.
The first letter of 'invoice' is 'i'.
'chit' enclosing 'an' is 'chiant'.
'chiant'+'i'='CHIANTI'
'for' is the link.
(Other definitions for chianti that I've seen before include "Popular dry red wine of Tuscany" , "Wine produced in Tuscany" , "Tuscan red wine" , "Dry red Italian wine" , "I can hit for popular Italian wine" .)