Total calculated wrongly then correctly (8)
I believe the answer is:
outright
'total' is the definition.
(I've seen this before)
'calculated wrongly then correctly' is the wordplay.
'calculated wrongly' becomes 'out' (I can't explain this - if you can you should give a lot more credence to this answer).
'then' is a charade indicator (letters next to each other).
'correctly' becomes 'right' (synonyms).
'out'+'right'='OUTRIGHT'
Can you help me to learn more?
(Other definitions for outright that I've seen before include "Absolute - utter" , "Without reservation or stipulation" , "Without qualification" , "Completely and openly - say a win" , "Completely and entirely, not gradually" .)