River used to deliver practically everything! (6)

I believe the answer is:

amazon

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'river' is the definition.
(Amazon River is an example)

I can't explain the remainder of the clue.

(Other definitions for amazon that I've seen before include "Great river of S America, or a tough woman" , "seller on the Internet" , "River in South America" , "Mythical woman warrior and river" , "Female warrior of Greek myth" .)

I've seen this clue in The Irish Times.

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