One mixes well in second-class bank (7)
I believe the answer is:
blender
'one mixes well' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'second-class bank' is the wordplay.
'second-class' becomes 'b' ().
'bank' becomes 'lender'.
'b'+'lender'='BLENDER'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for blender that I've seen before include "Kitchen device" , "Kitchen utensil" , "Liquidising device" , "kitchen equipment" , "used to make assets liquid?" .)