The term 'FORM OF WRESTLING' can be summarized by the crossword solution of 'SUMO', which is a form of wrestling originating in Japan. It is a competitive full-contact sport where two wrestlers, known as rikishi, attempt to force each other out of a circular ring or into touching the ground with any body part other than the soles of their feet. SUMO is a popular spectator sport in Japan and is also practiced worldwide.