Supervisor claiming time for driver's error (9)
I believe the answer is:
oversteer
'driver's error' is the definition.
(type of driving error)
'supervisor claiming time' is the wordplay.
'supervisor' becomes 'overseer' (an overseer supervises others).
'claiming' indicates putting letters inside.
'time' becomes 't' (abbreviation).
'overseer' going around 't' is 'OVERSTEER'.
'for' acts as a link.
(Other definitions for oversteer that I've seen before include "Fault in vehicle's performance" , "(Of vehicle) exaggerate turning motion" , "Mechanical fault in vehicle" , "misjudge a corner" , "(Of car) turn more sharply than intended" .)