European Frenchman in charge of attack (7)
I believe the answer is:
polemic
'attack' is the definition.
(I've seen this before)
'european frenchman in charge' is the wordplay.
'european' becomes 'pole' (someone from Poland).
'frenchman' becomes 'm' (abbreviation for Monsieur - like 'Mr').
'in charge' becomes 'ic' (abbreviation for 'in charge').
'pole'+'m'+'ic'='POLEMIC'
'of' is the link.
(Other definitions for polemic that I've seen before include "Fierce spoken or written attack" , "Controversy, argument" , "tirade" , "Strong spoken or written attack" , "Controversial line of argument" .)