Possible Clues:

• Musicians' rates very good, initially paid back
• Beats stuffing out of tortoise one afternoon in retirement
• Adagio, allegro, etc. (var.)
• Andante and adagio
• Musical beats (var.)
• Times called in bars
• Allegro and andante
• Times page covered by feature, beginning to end
• Rates exasperate MP in House
• Satisfied over constant rates