Possible Clues:

• Hello -- your ears must be burning!
• "Well, look who's here!"
• He just appears gentle around climax: he made it up
• 'We were just talking about you!'
• Festive polka he'd danced, an unexpected turn-up
• Look who just walked in to gossip about man downstairs
• "We were just talking about you!" and a hint to the first words of the answers to the starred clues
• "Mention you, and there you are!"
• *'Look who it is ...'
• 'Look who just showed up!'