1) Curio 2) Curiosity 3) Exhibition highlight 4) Exhibition item 5) Exhibition work 6) Oddity 7) Oddment 8) Outstanding work 9) Peculiarity 10) Piece de resistance 11) Prized item in a display 12) Rarity 13) Reveal part of big number Found on https://www.crosswordclues.com/clue/showpiece
1) Curio 2) Curiosity 3) Exhibition highlight 4) Exhibition item 5) Exhibition work 6) Oddity 7) Oddment 8) Outstanding work 9) Peculiarity 10) Piece de resistance 11) Prized item in a display 12) Rarity 13) Reveal part of big number