Impressive display upriver in Melbourne (5)

I believe the answer is:

array

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'impressive display' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for array that I've seen before include "Order - arrangement" , "Rig up" , "Fine assortment" , "Matrix; display neatly" , "An imposing series or display" .)

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

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