Nervous man reversed around vehicle (6)
I believe the answer is:
scared
'nervous' is the definition.
(I've seen this before)
'man reversed around vehicle' is the wordplay.
'man' becomes 'des' ().
'reversed' shows that the letters should be reversed in order.
'around' indicates putting letters inside.
'vehicle' becomes 'car' (car is a kind of vehicle).
'des' written backwards gives 'sed'.
'sed' enclosing 'car' is 'SCARED'.
(Other definitions for scared that I've seen before include "Frightened or intimidated" , "having kittens" , "Afraid, anxious" , "in fright" , "Frightened, alarmed" .)