Plan stratagem importing European drink (10)
I believe the answer is:
chartreuse
'drink' is the definition.
(Chartreuse is an example)
'plan stratagem importing european' is the wordplay.
'plan' becomes 'chart' (charting is a kind of planning**).
'stratagem' becomes 'ruse' (I've seen this before).
'importing' means one lot of letters goes inside another.
'european' becomes 'e' (abbreviation e.g. EU).
'ruse' enclosing 'e' is 'reuse'.
'chart'+'reuse'='CHARTREUSE'
(Other definitions for chartreuse that I've seen before include "The spirit" , "Green-yellow liqueur" , "Carthusian liqueur" , "Pale green-yellow colour" , "green liquid" .)