Possible Clues:

• Game that's a mere nothing
• Game that may be played by musicians
• Opening in dance mostly a minor matter
• Finish off bread roll after eating a peach trifle
• Piano piece provides opening in brief musical entertainment
• Game secured by beauty holding a gun
• Lovely to include a rich cake halved in trifle
• Be carrying one stone two pounds, a trifling amount
• Venus, perhaps, encompassing range, Holst's ultimate musical composition
• Trifle dish containing ace tuck woman's rejected