Clive Entwistle was born in London, England in 1916. At the age of only 19 he designed the Russell & Bromley shoe shops in Ealing, London (1935) and Tunbridge Wells, Kent (1936) in collaboration with Sydney W. Newbery (1894-1985), and in 1938, still aged only 21, collaborated with Le Corbusier (1887-1965) and Leo Herbert Fenton (?-1968) in the design of a prototype weekend cottage for Arundell Clarke (stand 199) for the Woman's Fair at Olympia in London.
He received no formal training as an architect but studied independently and in 1945 passed the exams of the Royal Institute of British Architects (RIBA).
Following World War Two he designed exhibits for UNESCO and USIS, and submitted a tensile roof design for the Crystal Palace sports arena competition in the late 1940s. Working with Amancio Williams (1913-1989) in Argentina in 1949, he designed a tensile skyscraper. From the 1950s onwards, Entwistle worked mainly in the USA. After serving as a design coordinator for Lippincott & Margulies, and as chief designer for Charles Luckman Associates, he opened his own architectural office in New York City.
In addition to his work as an architect, Entwistle taught for a period at the University of Pennsylvania School of Architecture. He worked on a number of projects for the New York World's Fair of 1964-65. He patented a 'Tensile Tower System' for buildings with floors suspended on cables and supported by a central concrete core.
A model of this and other tensile structures designed by Entwistle are illustrated in 'Industrial Design' vol.10, no.4, April 1963 (pp.64-67). Entwistle died in the Manhattan, New York in 1976 and is buried in the George Washington Memorial Park in Paramus, New Jersey.