La Paz's marvellous mall (5)

I believe the answer is:

plaza

I'm a little stuck... Click here to teach me more about this clue!

'mall' is the definition.
(I know that mall can be written as plaza)

'la paz's marvellous' is the wordplay.
'la paz' anagrams to 'PLAZA'.
Though, I am not clear how this is indicated.

Can you help me to learn more?

(Other definitions for plaza that I've seen before include "Public square for pedestrians" , "Hotel" , "Public square or market" , "open space" , "Town square (Sp.)" .)

I've seen this clue in the Sydney Morning Herald.

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