Practice with vehicle almost covered in concrete (9)
I believe the answer is:
rehearsal
'practice' is the definition.
(rehearsal is a kind of practice)
'vehicle almost covered in concrete' is the wordplay.
'vehicle' becomes 'hearse' (vehicle for a coffin).
'almost' means to remove the last letter (most of the word but not all of it).
'covered in' means one lot of letters goes inside another.
'concrete' becomes 'real' (associated in meaning).
'hearse' with its final letter taken off is 'hears'.
'hears' put inside 'real' is 'REHEARSAL'.
'with' acts as a link.
(Other definitions for rehearsal that I've seen before include "Drill" , "preparation in house?" , "Practice - run-through" , "Dummy run" , "Preparation for a show" .)