Attack in anger following boozer (7)
I believe the answer is:
barrage
'attack' is the definition.
(barrage is a kind of attack)
'anger following boozer' is the wordplay.
'anger' becomes 'rage' (rage is a kind of anger).
'following' says to put letters next to each other.
'boozer' becomes 'bar'.
'rage' after 'bar' is 'BARRAGE'.
'in' acts as a link.
(Other definitions for barrage that I've seen before include "Artificial obstruction in a river" , "Deterrent to low-flying air attacks" , "number of shots" , "Heavy bombardment" , "Prolonged artillery fire" .)