One too young to start tippling (3)
I believe the answer is:
tot
'one too young' is the definition.
I can't judge whether this definition defines the answer.
'to start tippling' is the wordplay.
'start' says to take the initial letters.
The first letter of 'tippling' is 't'.
'to'+'t'='TOT'
Can you help me to learn more?
(Other definitions for tot that I've seen before include "Arithmetic for infant" , "Small quantity of alcoholic drink" , "Small amount of spirits" , "Nip" , "Small measure for a small child" .)