Make sure head of finance goes over the charges (4)
I believe the answer is:
fees
'the charges' is the definition.
(fee is a kind of charge)
'make sure head of finance goes over' is the wordplay.
'make sure' becomes 'see' (synonyms).
'head of' suggests taking the first letters.
'goes over' is a reversal indicator.
The first letter of 'finance' is 'f'.
'see'+'f'='seef'
'seef' back-to-front is 'FEES'.
(Other definitions for fees that I've seen before include "Fixed charges for professional services" , "pay" , "Service charges" , "Professional payments" , "Charges, payments" .)