A boozer, so takes little tea! (3)
I believe the answer is:
sot
'a boozer' is the definition.
(I've seen this in another clue)
'so takes little tea' is the wordplay.
'takes' means one lot of letters go next to another.
'little' says to take the initial letters.
The initial letter of 'tea' is 't'.
'so'+'t'='SOT'
(Other definitions for sot that I've seen before include "Habitual drinker" , "Lush" , "Boozer" , "One drinks" , "Habitual drunkard" .)