Work of art (4)

'work of art' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for opus that I've seen before include "Creative work, eg in writing, art or music" , "Soup (anag.)" , "Composition - magnum __" , "Work (of a composer?)" , "(Numbered) musical composition" .)
'work of art' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for creation that I've seen before include "The bringing into existence of something" , "Act of bringing into being" , "Life, the universe and everything" , "A thing made or invented" , "Something that has been made" .)
'work of art' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sculpture that I've seen before include "3-D art form" , "Artwork produced by carving, moulding etc" , "artistic work" , "Plastic art" , "Art in three dimensions" .)
'work of art' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for piece that I've seen before include "Musical work; bit" , "Portion; musical work" , "Castle, perhaps" , "A bit of something" , "Portion, bit" .)