Among those with whom Clarissa danced at that year's Liberal Ball was the future double agent Donald Maclean, who complained that she was too smart to be "a proper Liberal girl like the Bonham-Carters or the Asquiths". She also knew Guy Burgess, who fled to Russia in 1951 when he and Maclean were about to be unmasked as traitors. A 2015 biography of Burgess, a homosexual, contained claims that, encouraged by his Soviet "handlers", he had contemplated marriage to Clarissa. However, the latter, then aged 95, denied that they had been close. She described Burgess as "courteous, amusing, nice and good company", but said that he had been "standoffish" towards her and did not wish any friendship to develop.