Club, very familiar music venue (9)
I believe the answer is:
woodstock
'music venue' is the definition.
'club very familiar' is the wordplay.
'club' becomes 'wood' (wood is a kind of club).
'very familiar' becomes 'stock' (eg a stock phrase).
'wood'+'stock'='WOODSTOCK'
(Other definitions for woodstock that I've seen before include "Pivotal American music festival in 1969" , "Famous US rock festival" , "1969 US rock festival" , "Log pile" , "Snoopy's confidant" .)