Possible Clues:

• Writing ain't about Bob on short course with colourful swimmer
• Fish worn out a bit swimming around river
• Artist in London E3 with grumpy woman spotted swimmer
• Finely coloured fish
• I turn rowboat - reeling in this?
• Artist in London area touching old woman? I'm tickled!
• Argue about a trendy key solicitor trapping river fish
• Finely marked and coloured fish originally from North America
• At the end of it, precious type finds team leader with crush ¿ would he be a colourful catch?
• Freshwater fish