Impetuous writer in car lacking a vehicle safety feature? (5,7)
I believe the answer is:
crash barrier
'safety feature?' is the definition.
The definition suggests a singular noun which matches the answer.
'impetuous writer in car lacking a vehicle' is the wordplay.
I cannot quite see how this works, but
'impetuous' could be 'rash' (I've seen this in another clue) and 'rash' is present in the answer.
'writer' could be 'barrie' (I've seen this before) and 'barrie' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for crash barrier that I've seen before include "Strong safety fencing" , "Safety structure in centre of motorway" , "Safety fence" , "roadside safety feature" .)