Pacino leaves watertight excuses for some bird (4)

I believe the answer is:

ibis

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'for some bird' is the definition.
(ibis is a kind of bird)

I don't understand the remainder of the clue.

(Other definitions for ibis that I've seen before include "Bird sacred in Ancient Egypt" , "Revered bird" , "Bird venerated by ancient Egyptians" , "Wading bird of warm regions" , "Large wading birds with down-curved bills" .)

I've seen this clue in the Sydney Morning Herald.

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