Possible Clues:

• The ruby she's wearing is just to distract people
• Misleading clue embarrassed Holmes, initially slipping up
• Colourful food that's off-putting?
• Distraction gets wild herd straying
• The ruby on her finger is just to distract you
• This puts one off, it's so ruddy fishy (3, 7)
• Embarrassed by the woman's call? It's beside the point
• The ruby on her hand may divert your attention
• Embarrassed-looking husband going wrong creates a diversion
• Ruby on hand was just there for the girl to put you off