Baby or toddler (3)
I believe the answer is:
tot
I believe this clue is a double definition.
'baby' is the first definition.
(I've seen this before)
'toddler' is the second definition.
(synonyms)
(Other definitions for tot that I've seen before include "Small quantity of alcoholic drink" , "Small drink of spirits" , "Add a small drink of rum for the toddler" , "Nip" , "Dram; small child" .)