Possible Clues:

• Benny's instrument
• Isaac Stern's instrument
• Music maker playing PM's place with zero backing
• Instrument for mixing oil into French wine
• 5, 10, 50 in what's played!
• Where to see a chin rest
• Nigel Kennedy instrument
• 'A table, a chair, a bowl of fruit and a ___; what else does a man need to be happy?': Albert Einstein
• Instrument producing crude oil in Bordeaux, perhaps
• Stradivarius e.g.