Twister charged over a con (7)
I believe the answer is:
tornado
'twister' is the definition.
('tornado' can be a synonym of 'twister')
'charged over a con' is the wordplay.
'charged' becomes 'torn' ('charge' and 'tear' can both mean run quickly).
'over' means one lot of letters go next to another.
'con' becomes 'do' (to 'do' someone could be to con them).
'torn'+'a'+'do'='TORNADO'
(Other definitions for tornado that I've seen before include "Violent wind storm" , "wind-up" , "Major storm" , "squall" , "great deal of wind" .)