Ukip leader entering vehicle getting a shock (6)
I believe the answer is:
trauma
'shock' is the definition.
(I've seen this before)
'ukip leader entering vehicle getting a' is the wordplay.
'leader' indicates taking the first letters.
'entering' indicates putting letters inside.
'vehicle' becomes 'tram' (tram is a kind of vehicle).
'getting' is a charade indicator (letters next to each other).
The first letter of 'ukip' is 'u'.
'u' placed inside 'tram' is 'traum'.
'traum'+'a'='TRAUMA'
(Other definitions for trauma that I've seen before include "Emotional upset" , "hurt" , "Bodily or mental injury" , "Bodily or mental shock" , "Physical injury (medical)" .)