Possible Clues:

• Light teasing repartee
• Good-humoured teasing
• Banter
• Less well entertained by a bit of light banter
• Rare lily found broken in the chaff
• Banter train passengers go in for?
• Ridicule this by train, perhaps
• Perhaps training for banter
• Remove lead from bumps felt on track with light ribbing
• Sounds as if perhaps one might need training for such banter