Frenzy in shooting gallery when Nationalist released (4)
I believe the answer is:
rage
'frenzy' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for rage that I've seen before include "Fierce anger" , "Uncontrolled anger" , "See red" , "Fury, passion" , "Fashionable" .)