Clarke looking forward to U20 showdown with Welsh
Wales head coach Phil Davies has made two changes to the side that beat France 43-8 a fortnight ago for the crunch clash against Ireland, who stride confidently into this game after a quality 25-10 win over England on the same weekend.
Dan Watchurst missed the France game through illness and returns in place of Rhodri Jones, who has sustained an injury and Scarlets scrum-half Gareth Davies makes his first full start for the national team.