On 11 June 2022, she made a rare public speaking appearance in Liverpool, England to address the Annual Meeting of the Women's Institute.

During the late 1990’s she took a year away from sport and major venues and spent time working for the aid agency Care International.

Clarke worked 32 Championships at Wimbledon; starting as a school leaver in 1986, looking after the Ball Boys and Girls, and was appointed Championships Director in 2013, responsible for overall event planning, management and delivery, security, stewarding, ticketing, public safety, catering and player liaison.

[7] Clarke was appointed Black Rod in November 2017[2] by Queen Elizabeth II, and took up the role in February 2018, succeeding Lieutenant General David Leakey, who retired in December 2017.

[8] She is the first female Black Rod,[9] the post previously having been filled by retired senior officers; she is also the first non-military appointment for almost 200 years.

In addition, she is responsible for the organisation and delivery of ceremonial events, such as State Opening and state visits to Westminster and for the daily administration of the King's residual estate in the Palace of Westminster including the Chapel of St Mary Undercroft, the Robing Room and the Royal Gallery.

Clarke was appointed a Commander of the Royal Victorian Order (CVO) in the 2023 Demise Honours "for services to the Lying-in-State of Her Majesty Queen Elizabeth II.