Charge around Arizona with atomic weapon (7)
I believe the answer is:
bazooka
'weapon' is the definition.
(I've seen this before)
'charge around arizona with atomic' is the wordplay.
'charge' becomes 'book' (book can mean to charge someone with a crime).
'around' indicates putting letters inside.
'arizona' becomes 'az' (I've seen this in other clues).
'with' is a charade indicator (letters next to each other).
'atomic' becomes 'a' (eg in A-test, atomic test).
'book' going around 'az' is 'bazook'.
'bazook'+'a'='BAZOOKA'
(Other definitions for bazooka that I've seen before include "A portable rocket-launcher" , "Anti-tank rocket launcher - trumpet-shaped kazoo" , "Musical instrument - military weapon" , "Portable anti-tank weapon" , "Anti-tank gun" .)