A boozer, so takes little tea! (3)
I believe the answer is:
sot
'a boozer' is the definition.
(both can mean an alcoholic)
'so takes little tea' is the wordplay.
'takes' means one lot of letters go next to another.
'little' indicates taking the first 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" .)