The feature request affects built-in filter cell components for primitive types such as StringFilterCellComponent, NumericFilterCellComponent, etc.
The built-in filter cell components currently allow to hide operators, but doesn't allow to hide clear button, which is being shown when a user provides some input to these filters. The workarounds are in the current moment possible, but seems to be not very maintainable, as the most obvious workaround is to control with the CSS the internal stylings of the components, which can change with any patch. I would hope for some toggle, which can control hide/display of the clear button.
The use-case in which someone might want to achieve this, is when the filtering is being cleared only globally for the whole grid. and local clearing is not necessarily desired.
The behavior can be tested on an example or provided example in official docs.