Successful song provides beat (3)
I believe the answer is:
hit
I believe this is a double definition.
'successful song' is the first definition.
(I've seen this in another clue)
'beat' is the second definition.
(I've seen this before)
'provides' is the link.
(Other definitions for hit that I've seen before include "The shot < to > beat" , "Of a play, a smashing success" , "Rap" , "Of play, a huge success" , "Strike, clout" .)