Remove jacket in damp haze and long to get into river (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 "Legendary woman warrior and river" , "Flower" , "Strong, aggressive woman" , "One of a mythic nation of women warriors" , "Female warrior - parrot - South American river" .)

I've seen this clue in The Irish Times.

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