Crossword Genius

Swallows perhaps settle nose to tail (4)

Ross

I believe the answer is:

eats

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'swallows' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

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(Other definitions for eats that I've seen before include "corrodes" , "Ingests" , "Grazes perhaps" , "Munches" , "Food (colloq.)" .)

I've seen this clue in The Independent.
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