Is it required to post the values immediately as user enters the data?. If it is not required, until the user submits the flow action data wouldn't be posted to clipboard. So we need not clear any data if user clicks some other action.
Looks like only option is to clear in pre processing of the Flow action. You can create a Data transform/activity in a class which is accessible to all flow actions and use it in pre processing. Thanks.
This option already tried and implemented as work around. Do we have any extension point in OOTB, where we can add for reusability. If we add new flow action, it will work and no need to add Data transform/activity.