On 15 September 2018, Clarke was a part of the Worcestershire side that secured their maiden T20 Blast title as they went on to beat Lancashire and Sussex on finals day.
[4][5] In May 2019, the England and Wales Cricket Board (ECB) withdrew Clarke from the Lions' squad, after being named during Alex Hepburn's rape trial.
[6] Hepburn was found guilty of rape, and although the judge said that Clarke "did nothing wrong" on the night of the attack,[6] the ECB was concerned about the disrespectful messages about women that had been previously exchanged.
[6] On 21 June 2019, the English Cricket Board charged Joe Clarke and Tom Kohler-Cadmore with bringing the game into disrepute in relation to their participation in a Whatsapp group which was evidence in the Alex Hepburn rape case.
[11][12] Playing for Nottinghamshire in April 2024, Clarke scored 213 not out against Somerset in an unbroken partnership of 392 with Will Young which set a new record for a third-wicket stand for the club, surpassing the previous mark that had stood for 121 years.