Shoot a trouble-maker in European city (8)
I believe the answer is:
budapest
'european city' is the definition.
(capital of Hungary)
'shoot a troublemaker' is the wordplay.
'shoot' becomes 'bud' (I've seen this in another clue).
'troublemaker' becomes 'pest'.
'bud'+'a'+'pest'='BUDAPEST'
'in' acts as a link.
(Other definitions for budapest that I've seen before include "Put beads in the city on the Danube" , "Put beads in the European city" , "Capital of Hungary" , "capital location" , "Hungarian capital" .)