Clashes are really swift, which means they’re quite difficult to react to on the fly. Having the ability to react to a clash could be beneficial, since you’d essentially be able to steal pressure from your opponent, maybe even sometimes punish, but having this skill in the heat of a match for a situation that so rarely occurs could be difficult. HOWEVER, since Guard Breaks (6M) are 0 on block, there might be some interesting exploits you can use to your advantage against an opponent if they like to mash after blocking it. For example, maybe after having your 6M blocked, your opponent always mashes reversal 5L. You can surprise them by also meeting them with a 5L and a tacked on button to punish after the clash (Protip: Once you do it, shrug it off like it was unintentional for optimal mind games). There could be other ways to set up this situation, but it would require lab time to figure out and is most certainly a preemptive type of setup. Check your frame data, test your options, and pull off some amazing high-level Clash setups to dumbfound your opponent!