Wear diamonds, entering a bank in Glasgow (6)
I believe the answer is:
abrade
'wear' is the definition.
(I've seen this before)
'diamonds entering a bank in glasgow' is the wordplay.
'diamonds' becomes 'd' (abbreviation in bridge say).
'entering' is an insertion indicator.
'bank in glasgow' becomes 'brae' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'a'+'brae'='abrae'
'd' inserted within 'abrae' is 'ABRADE'.
Can you help me to learn more?
(Other definitions for abrade that I've seen before include "Wear away by erosion" , "Scratch" , "Chafe" , "Shave" , "Day breaks? > Start as before" .)