Rough speed on a road (8)
I believe the answer is:
tearaway
'rough' is the definition.
(I've seen this before)
'speed on a road' is the wordplay.
'speed on' becomes 'tear' (tearing is a kind of speeding. I am not sure about the 'on' bit.).
'road' becomes 'way' (I've seen this in other clues).
'tear'+'a'+'way'='TEARAWAY'
Can you help me to learn more?
(Other definitions for tearaway that I've seen before include "Unruly youth" , "unruly character" , "Reckless violent person" , "Might I stir" , "reckless type" .)