Fizzy drink for father (3)
I believe the answer is:
pop
I believe this clue is a double definition.
'fizzy drink' is the first definition.
(I've seen this before)
'father' is the second definition.
(pop is a kind of father)
'for' is the link.
(Other definitions for pop that I've seen before include "Soft drink - father - music - light explosion" , "Modern music for the masses" , "Thus goes the weasel in song" , "Youthful music for dad?" , "Cartoon sailor (showing amazement?)" .)