Means of payment (6,4)
(Other definitions for credit card that I've seen before include "Piece of "plastic''" , "Means of borrowing" , "Entrant to 1 Across [CASH DISPENSER]" .)
(Other definitions for cheques that I've seen before include "Sort of ready" , "Money orders" , "Bank orders" .)
(Other definitions for cheque that I've seen before include "Bank document" , "means of transferring funds" , "A payment order form" , "Written order directing a bank to pay money" , "Means of payment" .)
(Another definition for debit card that I've seen is " alternative to cash".)