Possible Clues:

• The "R" of R&B
• Pattern of recurrence of sounds
• Beat; cadence
• Beat foremost of rivals? Husband exploded myth
• Regular recurrence of sounds
• Measure my hat, my shirt -- occasionally back-to-front
• Beat, soundly?
• Recurring sound pattern
• Drummer’s specialty
• Beat poetry, unfinished -- and half of that is filling