Outlaw ridiculous road speed (9)
I believe the answer is:
desperado
'outlaw' is the definition.
(I know that Desperado is a type of outlaw)
'ridiculous road speed' is the wordplay.
'ridiculous' indicates anagramming the letters.
'road'+'speed'='roadspeed'
'roadspeed' with letters rearranged gives 'DESPERADO'.
(Other definitions for desperado that I've seen before include "Bold outlaw on the American frontier" , "Gangster" , "reckless one" , "Reckless guy" , "Bravo" .)