Possible Clues:

• The ruby on her hand may divert your attention
• Embarrassed by the woman's call? It's beside the point
• This puts one off, it's so ruddy fishy (3, 7)
• The ruby on her finger is just to distract you
• For her to have a ruby on her finger is just to put you off
• The ruby on her finger is just to put you off
• An irrelevance about Lawrence initially being inaccurate
• Misleading clue embarrassed Holmes, initially slipping up
• Colourful food that's off-putting?
• The ruby she's wearing is just to distract people