Possible Clues:

• Find it alongside river in fish
• One-in-a-million thing
• Scarcely one Academician I try to get after
• Find hint about slowing of music
• Something very scarce and often valuable
• 78 speed records, e.g.
• Uncommon item or event
• It's a wonder to try to make this on air
• Beam, clutching rupee: it's a collector's item?
• Creatively, I tarry -- that's not common