Emoji Keyboard, how to clear Recently Used tab?

I recently added Emoji as a second keyboard and AFAIK, it works as designed.

But when I first installed it and was testing it, I was unaware of the Recently Used tab so that now the Recently Used tab is populated with "garbage".

Ergo, is there a tip re how this tab may be reset or cleared?

Many thanks, Rampant.

Looks like I'll need to begin using more Emoji.