Dad, or soda (3)
I believe the answer is:
pop
I believe this clue is a double definition.
'dad' is the first definition.
(I know that dad can be written as pop)
'soda' is the second definition.
(synonyms)
(Other definitions for pop that I've seen before include "Youthful music, dad(3)" , "Sound of a balloon bursting" , "Explosive sound; drink" , "Explode; drink" , "Cartoon sailor (showing amazement?)" .)