sideshow
/ˈsaɪdʃəʊ/noun
1- a small show or stall at an exhibition, fair, or circus（展览会或博览会的）附带展出, 小型摊位; （马戏团的）穿插表演。
1.1
- figurative a minor or diverting incident or issue, especially one which distracts attention from something more important〈喻〉小事; 次要问题。