Father’s fizzy drink (3)
I believe the answer is:
pop
I believe this clue is a double definition.
'father's' is the first definition.
(pop is a kind of father)
'fizzy drink' is the second definition.
(I've seen this before)
(Other definitions for pop that I've seen before include "Sound of a drawn cork" , "Cartoon sailor (showing amazement?)" , "Music with mass appeal" , "'American Dad'!" , "US fizzy drink and type of music" .)