Pop group lodged in Cotswold mansion

• River of song
• Hemingway's Santiago, in the story's title
• Hemingway sea-goer
• "The --- and the Sea"
• Gary who played Beethoven in "Immortal Beloved"
• Lethbridge's river
• 2018 Best Actor Gary
• Gary of 'Tinker Tailor Soldier Spy'
• Part of a Hemingway title

Wiktionary Word definitions in Wiktionary
n. (context nonstandard proscribed English) An old man.