Crossword Genius

Swamp thing (4)

Ross

I believe the answer is:

peat

'swamp thing' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for peat that I've seen before include "Bog material" , "Saturated and compressed vegetable matter, used as fuel when dried out" , "Form of fuel" , "Partially carbonised vegetable matter saturated with water" , "Organic fuel" .)

I've seen this clue in the Newsday and the Penny Press.
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