Swine brought back though some members of orchestra objected (4)
I believe the answer is:
boar
'swine' is the definition.
(male pig)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(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" .)