Crossword Genius

Swine brought back though some members of orchestra objected (4)

Ross

I believe the answer is:

boar

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'swine' is the definition.
(male pig)

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

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(Other definitions for boar that I've seen before include "Resting place for birds or bats" , "Uncastrated male hog" , "Wild pig sounds tedious" , "Wild swine" , "Uncastrated male pig" .)

I've seen this clue in The Irish Times.
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