Bank, maybe, on second rate kitchen appliance (7)
I believe the answer is:
blender
'kitchen appliance' is the definition.
(I've seen this before)
'bank maybe on second rate' is the wordplay.
'bank maybe' becomes 'lender'.
'on' says to put letters next to each other.
'second rate' becomes 'b'.
'lender' put after 'b' is 'BLENDER'.
(Other definitions for blender that I've seen before include "Good mixer" , "Kitchen liquidiser" , "Kitchen device" , "kitchen equipment" , "Liquidising device" .)