Current noble's relations (8)
I believe the answer is:
accounts
'relations' is the definition.
(account is a kind of relation)
'current noble's' is the wordplay.
'current' becomes 'ac' (alternating current).
'noble's' becomes 'count's' (count is a kind of noble).
'ac'+'counts'='ACCOUNTS'
(Other definitions for accounts that I've seen before include "Records of financial transactions (8)" , "Statement of a company's financial affairs" , "Stories" , "Reports of events" , "Statements concerning money." .)