Possible Clues:

• Concert Steinway, say
• Very good soft instrument
• Steinway, for example
• One's played God swiping last of Martini in knees-up for seniors?
• Good money Scotsman put in Post Office — key investment?
• Terrific musical instrument?
• Foreign money in grand prix initially is all new - obviously it comes with strings attached and it is not upright
• Good money Scotsman placed in Post Office -- sound investment?
• King, along with pawn on rook's square, held up major feature of key play?
• Instrument is excellent at getting ATM code including opening accounts to order