Magnificent party, we hear -- top quality wine (5,3)
I believe the answer is:
grand cru
'top quality wine' is the definition.
'grand cru' can be an answer for 'wine' (term for high-quality wine). I'm unsure of the 'top quality' bit.
'magnificent party we hear' is the wordplay.
'magnificent' becomes 'grand' (I've seen this before).
'party' becomes 'crew' (both can mean a group of people).
'we hear' shows a homophone (sound like).
'crew' is a homophone of 'cru'.
'grand'+'cru'='GRAND CRU'
Can you help me to learn more?
(Other definitions for grand cru that I've seen before include "special wine" , "A wine of the best grade" , "fine wine" , "Type of wine" , "Superior wine" .)