Said pheasant is revolting (4)

I believe the answer is:

foul

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

I can't explain the remainder of the clue.

(Other definitions for foul that I've seen before include "Filthy" , "Abominable - offence on football field" , "Abhorrent" , "Offensive; polluted" , "Illegitimate tackle" .)

I've seen this clue in The Irish Times.

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