Check vehicle at end of circuit (5)
I believe the answer is:
audit
'check' is the definition.
(I've seen this before)
'vehicle at end of circuit' is the wordplay.
'vehicle at' becomes 'audi' (I am not sure about this - if you are sure you should believe this answer much more).
'end of' says to take the final letters.
The final letter of 'circuit' is 't'.
'audi'+'t'='AUDIT'
Can you help me to learn more?
(Other definitions for audit that I've seen before include "Verify accounts" , "Financial review" , "vetting of books" , "Examine accounts" , "Inspection of the account books" .)