I see entertaining creature of habit in swamp (8)

I believe the answer is:

inundate

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'swamp' is the definition.
('inundate' can be a synonym of 'swamp')

I can't explain the rest of the clue.

(Other definitions for inundate that I've seen before include "Overwhelm, swamp" , "Flood, cover with water" , "Flood - and unite (anag)" , "be overwhelming" , "Flood (a place)" .)

I've seen this clue in The Times.

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