Practised parking English undertaker’s vehicle in road (9)
I believe the answer is:
rehearsed
'practised parking' is the definition.
'rehearsed' can be an answer for 'practised' ('rehearse' can be a synonym of 'practise'). I'm not certain of the 'parking' bit.
'english undertaker's vehicle in road' is the wordplay.
'english' becomes 'E' (abbreviation).
'undertaker's vehicle' becomes 'hearse' (I've seen this before).
'in' is an insertion indicator.
'road' becomes 'rd' (abbreviation).
'e'+'hearse'='ehearse'
'ehearse' placed within 'rd' is 'REHEARSED'.
(Other definitions for rehearsed that I've seen before include "Practised for public performance" , "Practiced (a play)" , "Front-rear axle distance" , "went over" .)