Examination on book work (5)
I believe the answer is:
audit
'examination' is the definition.
(I know that audit is a type of examination)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for audit that I've seen before include "Financial check" , "Inspection of the account books" , "Financial review" , "Verify accounts" , "special ale" .)