Bank business (7)
I believe the answer is:
lending
'bank business' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lending that I've seen before include "[RATE] Barclays were 7 [FIXING]" , "Giving for a limited time" , "such libraries" , "Loaning" , "Giving temporarily" .)