Clucas scored on the opening day of the 2019–20 season in a 2–1 defeat against Queens Park Rangers. Stoke began the season in poor form, failing to win any of the opening ten matches and were rooted to the bottom of the table by October. Michael O'Neill was brought in as new manager in November and Clucas scored twice in his first game in charge in a 4–2 win at Barnsley with his first goal scored from the half-way line. He scored again against Swansea on 25 January 2020 and in response to abuse from the Swansea support he ran the length of the pitch to celebrate in front of them. Clucas scored twice in a 5–1 victory over relegation rivals Hull City on 7 March 2020. The season was then suspended until June due to the COVID-19 pandemic. He scored a vital goal against Birmingham City on 12 July 2020 as Stoke avoided relegation and finished in 15th position. Clucas made 46 appearances in 2019–20 and was top goalscorer with 11. Clucas had injury problems during the 2020–21 campaign, making 26 appearances and underwent surgery on a double hernia in February 2021.
