Marshy outlet of southern US rivers and lakes (5)

I believe the answer is:

bayou

(Other definitions for bayou that I've seen before include "Swampy area" , "US marshy delta, eg Mississippi" , "nickname of US State" , "Marshy tributary of lake or river - a buoy (anag)" , "marshy water in New Orleans?" .)

I've seen this clue in The Times.

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