wiggle room
From Longman Dictionary of Contemporary Englishwiggle roomˈwiggle room noun [uncountable] if someone leaves themselves some wiggle room, they do or say something in a way that allows them to change it laterFrom Longman Business Dictionarywiggle roomˈwiggle ˌroom noun [uncountable] informal the possibility of changing your plans or decisions in order to achieve what you want or to suit a different situationHis statement should satisfy the media while leaving enough wiggle room in case interest rates continue to rise.