Possible Clues:

• Isn't switching partners in court natural behaviour?
• Flair
• Feeling at home on the way in to court
• Tendency gets in the way in court
• Inborn tendency or impulse
• Detective inspector abandons vague intuition
• Ability favoured good man in court
• Innate feeling
• Inborn impulse or tendency to behave in certain ways
• Natural feeling