Ducks in this enclosure would be black (3)

I believe the answer is:

sty

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'ducks in this enclosure would be black' is the definition.
'sty' can be an answer for 'enclosure' (sty is a kind of enclosure). I am unsure of the rest of the definition.

This is the entire clue.

Can you help me to learn more?

(Other definitions for sty that I've seen before include "Pigpen; swelling" , "Porcine pen" , "Pigs' pen" , "Pig's enclosure" , "Piggery" .)

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