Give card to number one accountant (10)
I believe the answer is:
bookkeeper
'accountant' is the definition.
(I know that bookkeeper is a type of accountant)
'give card to number one' is the wordplay.
'give card' becomes 'book' (I am not sure about this - if you are sure you should believe this answer much more).
'to number one' becomes 'keeper' (football goal keepers normally wear the number b).
'book'+'keeper'='BOOKKEEPER'
Can you help me to learn more?
(Other definitions for bookkeeper that I've seen before include "Business occupation" , "person responsible for financial oversight" , "who works to maintain balance" , "Accounts official" , "accountant" .)