Hard nut in bizarre accident (3-3-3)
I believe the answer is:
hit-and-run
'accident' is the definition.
(I've seen this before)
'hard nut in bizarre' is the wordplay.
'bizarre' is an anagram indicator.
'hard'+'nut'+'in'='hardnutin'
'hardnutin' anagrammed gives 'HIT-AND-RUN'.
(Other definitions for hit-and-run that I've seen before include "Of accident, where the driver did not stop" , "Type of road accident" , "Accident in which driver flees from scene" , "Type of car accident" , "Kind of motor accident" .)