Examination necessitating a lot of bookwork (5)
I believe the answer is:
audit
'examination' is the definition.
(I know that audit is a type of examination)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for audit that I've seen before include "vetting of books" , "Inspection of records" , "Official inspection of company accounts" , "Financial investigation" , "Inspect accounts" .)