Flier apt to have wet feet (4)

I believe the answer is:

ibis

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'flier' is the definition.
(ibis is a kind of birdanimal)

I can't explain the rest of the clue.

(Other definitions for ibis that I've seen before include "Large wader" , "Wader once sacred in Egypt" , "Near-colourless mineral" , "Wading bird with a down-curved bill" , "Large wading birds with down-curved bills" .)

I've seen this clue in the Evening Standard.

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