Clears account, then leaves office (7)
I believe the answer is:
acquits
'clears' is the definition.
('acquit' can be a synonym of 'clear')
'account then leaves office' is the wordplay.
'account' becomes 'ac'.
'then' is a charade indicator (letters next to each other).
'leaves office' becomes 'quits' ('quit' can be a synonym of 'leave office').
'ac'+'quits'='ACQUITS'
(Other definitions for acquits that I've seen before include "Finds not guilty and discharges" , "Pronounces not guilty" , "Clears" .)