Offender in crashed minicar, learner driver (8)
I believe the answer is:
criminal
'offender' is the definition.
(criminal is a kind of offender)
'crashed minicar learner driver' is the wordplay.
'crashed' indicates anagramming the letters.
'learner driver' becomes 'l' (I've seen this in other clues).
'minicar' is an anagram of 'crimina'.
'crimina'+'l'='CRIMINAL'
'in' is the link.
(Other definitions for criminal that I've seen before include "hood" , "Punishable by law" , "Lawless, felonious" , "Felon, lawbreaker" , "Person who breaks the law for a living" .)