The term 'Hyde Park Strollers' refers to a group of people who take leisurely walks in Hyde Park, one of the largest parks in London. The crossword solution for this term is 'PRAMS', which stands for 'Pushchairs and Rolling Mobility Aids'. This term is used to describe the various wheeled devices that are used by people who are taking a stroll in Hyde Park. These devices include pushchairs, wheelchairs, and other mobility aids.