Check car tyre's opening (5)
I believe the answer is:
audit
'check' is the definition.
(thesaurus)
'car tyre's opening' is the wordplay.
'car' becomes 'audi' (audi is a german car brand).
'opening' says to take the initial letters.
The first letter of 'tyres' is 't'.
'audi'+'t'='AUDIT'
(Other definitions for audit that I've seen before include "Inspect accounts" , "Review firm's accounts, annual check" , "Verify accounts" , "review of books" , "Financial inspection" .)