Agrees to have binders on account (7)
I believe the answer is:
accords
'agrees' is the definition.
(according is a kind of agreeing)
'binders on account' is the wordplay.
'binders' becomes 'cords'.
'on' means one lot of letters go next to another.
'account' becomes 'ac' (abbreviation for account).
'cords' put after 'ac' is 'ACCORDS'.
'to have' is the link.
(Other definitions for accords that I've seen before include "Is in harmony" , "is in agreement" , "Agreements between two states" .)