[1][2] In 2015 Clarke entered several events in an attempt to qualify for the World Snooker Tour and narrowly missed out by losing in the final of tournaments on 3 occasions.

In June 2015, Clarke qualified for the knockout stage of EBSA European Snooker Championship as the 19th seed where he lost 4–7 to Michael Wild in the final.

[3][4] The following month at the IBSF World Under-21 Snooker Championship Clarke once again reached the tournament final before losing 7–8 in the deciding frame to Boonyarit Keattikun.

In February 2016, Clarke once again reached the final of the EBSA European Snooker Championship as the number 1 seed, however he was once again defeated 4–7 losing to fellow countryman Jak Jones.

Clarke was finally able to gain professional status at the sixth attempt, in the EBSA Tour Qualifying Play-offs, thanks to victories over former World Championship semi-finalist Andy Hicks and English amateur George Pragnall.