Possible Clues:

• Flirt with
• Flirt with, in London
• Flirt with, in a way
• Use a line on
• Flirt with fellow outside the union
• Engage (someone) in flirtatious talk
• Engage (someone) in flirtatious conversation
• Woo verbally
• Talk in romantic terms to bird at university
• Flirt with bowler, perhaps, during trophy contest