Small craft in the drink? (7)
I believe the answer is:
martini
'the drink?' is the definition.
(martini is a kind of drink)
'small craft in' is the wordplay.
'small' becomes 'mini' (short for miniature).
'craft' becomes 'art' (both can mean cunning or trickery).
'in' is an insertion indicator.
'mini' enclosing 'art' is 'MARTINI'.
(Other definitions for martini that I've seen before include "Gin or vodka with dry vermouth" , "obtained from a bottle" , "Type of Italian vermouth" , "Cocktail made with gin or vodka and vermouth" , "alcoholic drink" .)