Details of account raving at Kent batsmen (4,9)
I believe the answer is:
bank statement
'details of account' is the definition.
(details of a bank account)
'raving at kent batsmen' is the wordplay.
'raving' indicates an anagram.
'at'+'kent'+'batsmen'='atkentbatsmen'
'atkentbatsmen' with letters rearranged gives 'BANK STATEMENT'.
(Other definitions for bank statement that I've seen before include "note of available funds" , "Listing for balance" , "Printed facts and figures" , "showing an indication of interest?" , "Record of financial transactions" .)