Drink for a small child (3)
I believe the answer is:
tot
I believe this is a double definition.
'drink' is the first definition.
(I've seen this before)
'a small child' is the second definition.
(I've seen this before)
'for' acts as a link.
(Other definitions for tot that I've seen before include "Small baby" , "Drop" , "Palindrome for small child" , "Arithmetic for infant" , "Add; small child" .)