Down payment raised is accepted by store (7)
I believe the answer is:
deposit
'down payment' is the definition.
('deposit' can be a synonym of 'down payment')
'raised is accepted by store' is the wordplay.
'raised' says the letters should be written in reverse.
'accepted by' indicates putting letters inside.
'store' becomes 'depot' ('depot' can be a synonym of 'store').
'is' reversed gives 'si'.
'si' inserted into 'depot' is 'DEPOSIT'.
(Other definitions for deposit that I've seen before include "Down-payment" , "Drop" , "Put down or leave something" , "store" , "Plant" .)