Drink for a baby (3)
I believe the answer is:
tot
I believe this clue is a double definition.
'drink' is the first definition.
(a small alcoholic drink)
'baby' is the second definition.
(I've seen this in another clue)
'for a' is the link.
(Other definitions for tot that I've seen before include "Dram; small child" , "Drop" , "Small baby" , "A wee dram" , "Palindrome for small child" .)