Possible Clues:

• Young salmon
• Intensely questions someone on the radio, as one will be capable of going against the flow
• Young salmon on its first return from saltwater
• In age it's above par by the sound of it
• Young salmon returning from sea to spawn
• A little salmon leg, sir?
• Fish with legs moving about river island
• Young salmon (6)
• This is where you get just a little salmon
• Young salmon returning for first spawning