Little drink Tory laced with drop of ouzo (7)
I believe the answer is:
soupcon
'little' is the definition.
(a soupcon is a small amount of something)
'drink tory laced with drop of ouzo' is the wordplay.
'drink' becomes 'sup' (to sup is to drink).
'tory' becomes 'con' (abbreviation for conservative).
'laced with' indicates putting letters inside (I've seen this in other clues).
'drop of' suggests taking the first letters.
The first letter of 'ouzo' is 'o'.
'sup'+'con'='supcon'
'supcon' enclosing 'o' is 'SOUPCON'.
(Other definitions for soupcon that I've seen before include "Smidgen" , "A vary small quantity, just a trace - from France" , "Dash" , "suspicion" , "Hint" .)