Rogue crashed cars going over a lake (6)
I believe the answer is:
rascal
'rogue' is the definition.
(I know that rogue can be written as rascal)
'crashed cars going over a lake' is the wordplay.
'crashed' indicates an anagram.
'going over' is a charade indicator (letters next to each other).
'lake' becomes 'l' (geographical abbreviation).
'cars' anagrammed gives 'rasc'.
'rasc'+'a'+'l'='RASCAL'
(Other definitions for rascal that I've seen before include "Impudent person" , "not one to be admired" , "Rogue of a lascar" , "'Scoundrel, rogue (6)'" , "Villain" .)