Possible Clues:

• Observers barring one European in Germany in spring (NOTE: Now find the game and play it...)
• Yellowstone's Lion, Steamboat or Castle
• Water-heater supplied by bloke’s sound?
• Spring bloke from trap
• Overheard old man that regularly lets off steam?
• Natural water jet
• Old Faithful is a famous one
• Picks up cockney fella in spring?
• Natural spring
• One blowing off steam