Dad's music (3)
I believe the answer is:
pop
I believe this clue is a double definition.
'dad's' is the first definition.
(synonyms)
'music' is the second definition.
(pop music)
(Other definitions for pop that I've seen before include "Soft drink - father - music - light explosion" , "Explosive sound; drink" , "Cartoon sailor (showing amazement?)" , "Explode; Eton society" , "'American Dad'!" .)