Chidyausiku was born in Domboshawa, Southern Rhodesia. He attended Mutake School at Makumbi Mission, and then St Ignatius college in Chishawasha. He won a place at the University of Rhodesia from 1968 to 1972 where he read law. He went into private legal practice. At the 1974 general election he won the Harari African Roll constituency, standing with the unofficial support of the African National Council which had been set up by ZANU, ZAPU and FROLIZI. He acted in opposition to the government of Ian Smith. Chidyausiku stood down at the 1977 election.