Possible Clues:

• Bad luck
• Most of the address by Lady Luck in Hard Times perhaps
• Reverse engineering of terminus
• Short address by Lady Luck in Hard Times perhaps
• Reverse M represents melody
• Uniform set created for Hard Times perhaps
• Maiden is leading supporting song, creating trouble
• Spymaster favours melody that could 21
• No hit, say, with backing melody? That's bad luck
• It's more fun tussling in adversity