The term 'Shirts' Opponents' can be solved by the crossword solution 'SKINS' (5 letters). SKINS is a term used to refer to the opposing team in a game of shirts and SKINS, a popular playground game. In this game, two teams are formed and each team is assigned either the role of 'shirts' or 'SKINS'. The team assigned the role of 'SKINS' must remove their shirts and play without them, while the team assigned the role of 'shirts' plays with their shirts on. The team assigned the role of 'SKINS' is referred to as the 'Shirts' Opponents'.