Possible Clues:

• Easy victory spells setback for Prime Minister and foot-soldiers
• Play piano at end (not beginning) of concert
• Or it's up to the Member to have some fun
• That's just for fun or back to one in Parliament
• Boisterous caper
• Light-hearted diversion
• Energetic play
• Frisk - gambol
• Play in concert, deferring intro
• Win big