Discharges account and leaves (7)
I believe the answer is:
acquits
'discharges' is the definition.
('acquit' can be a synonym of 'discharge')
'account and leaves' is the wordplay.
'account' becomes 'ac'.
'and' means one lot of letters go next to another.
'leaves' becomes 'quits' ('quit' can be a synonym of 'leave').
'ac'+'quits'='ACQUITS'
(Other definitions for acquits that I've seen before include "Pronounces not guilty" , "Clears" , "Finds not guilty and discharges" .)