Get bruise opening shop (9)

'shop' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'get bruise opening' is the wordplay.
'get' becomes 'land' (landing is a kind of getting).
'bruise' becomes 'pound' (I can't explain this - if you can you should give a lot more credence to this answer).
'opening' means one lot of letters go next to another (some letters appear before or \'open\' others).
'land' put after 'pound' is 'POUNDLAND'.

Can you help me to learn more?