Possible Clues:

• This was in the wind - only forestalled by dismissal
• Ancient musical instrument
• Bag this, although once you might have blown it
• One may get it by way of dismissal, yet have played the trombone with it
• Almost 108 gallons of sherry in old brass
• Bottomless wine cask for old musician
• Old instrument in bag, nevertheless
• Rob, then save a bit of old brass
• Save loot in the van's old instrument
• Dismiss objection showing old-fashioned brass