Drink with gang in small club (11)
I believe the answer is:
screwdriver
'drink' is the definition.
(screwdriver is a kind of drink)
'gang in small club' is the wordplay.
'gang' becomes 'crew' ('crew' can be a synonym of 'gang').
'in' indicates putting letters inside.
'small' becomes 's' (abbreviation - e.g. clothes size).
'club' becomes 'driver' (driver is a kind of club**).
's'+'driver'='sdriver'
'crew' put inside 'sdriver' is 'SCREWDRIVER'.
'with' is the link.
(Other definitions for screwdriver that I've seen before include "Hand tool - cocktail" , "Woodworker's tool" , "Drink" , "Cocktail (vodka and 4 down juice)" , "that'll turn a few heads" .)