Dad gets drink (3)
I believe the answer is:
pop
I believe this is a double definition.
'dad' is the first definition.
(I know that dad can be written as pop)
'drink' is the second definition.
(I know that pop is a type of drink)
'gets' acts as a link.
(Other definitions for pop that I've seen before include "Thus goes the musical weasel" , "Burst - fizzy drink - modern music - US dad" , "Palindrome of music for the young" , "Soft drink - father - music - light explosion" , "Youthful music, dad(3)" .)