Regular repeating sound (6)
I believe the answer is:
rhythm
(Other definitions for rhythm that I've seen before include "that takes some beating!" , "Measured beat" , "Musical or regular beat" , "essence of some music?" , "Pattern of beats" .)
I believe the answer is:
rhythm
(Other definitions for rhythm that I've seen before include "that takes some beating!" , "Measured beat" , "Musical or regular beat" , "essence of some music?" , "Pattern of beats" .)